2018 GMC Sierra 1500

Price & value

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Owner's manual

Get the free official owner's manual from GMC's manuals and guides page. Choose 2018 Sierra 1500. It covers maintenance schedules, fluids, towing limits and warning lights. Older years may not be listed online.

Recalls

A recall doesn't mean a truck still has the problem. Enter the truck's VIN at nhtsa.gov/recalls or ask a dealer to see whether the repair was done.

• Air Bags

  May 2026 · #26V325000

  General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles.

  Read more: details, risk and fix

  General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 vehicles. The left-side or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.

  Risk: A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or fragments of the inflator into the vehicle, increasing the risk of injury.

  Fix: Dealers will replace both RRAB modules, free of charge. Owner notification letters were mailed June 24, 2026. Owners may contact GMC customer service at [phone removed] or Chevrolet customer service at [phone removed]. GM's number for this recall is N262557310. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on May 21, 2026. This recall expands previous NHTSA recall number 26V166.

• Air Bags

  Mar 2026 · #26V166000

  General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 Crew Cab vehicles.

  Read more: details, risk and fix

  General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2019 Chevrolet Silverado 2500, Silverado 3500, GMC Sierra 2500, and Sierra 3500 Crew Cab vehicles. The left or right-side roof rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.

  Risk: A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or fragments of the inflator into the vehicle, increasing the risk of injury.

  Fix: Dealers will replace the left and right-side RRAB modules, free of charge. Owner notification letters were mailed April 16, 2026. Owners may contact GMC customer service at [phone removed] or Chevrolet customer service at [phone removed]. GM's number for this recall is N262549710. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 19, 2026.

• Air Bags

  Jun 2025 · #25V432000

  General Motors (GM) is recalling certain 2018 GMC Sierra 1500, 2019 Sierra 2500, 3500, Chevrolet Silverado 3500, and Chevrolet Silverado 2500 and 2018 Chevrolet Silverado 1500 Crew Cab vehicles.

  Read more: details, risk and fix

  General Motors (GM) is recalling certain 2018 GMC Sierra 1500, 2019 Sierra 2500, 3500, Chevrolet Silverado 3500, and Chevrolet Silverado 2500 and 2018 Chevrolet Silverado 1500 Crew Cab vehicles. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.

  Risk: A detached end cap or inflator rupture can allow compressed gas to escape and project the end cap or fragments of the inflator into the vehicle, increases the risk of injury or crash.

  Fix: Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed July 23, 2025. Owners may contact GMC customer service at [phone removed] or Chevrolet customer service at [phone removed]. GM's number for this recall is N252513060.

• Air Bags:Side/Window:Curtain:Inflator

  Oct 2024 · #24V756000

  General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks.

  Read more: details, risk and fix

  General Motors, LLC (GM) is recalling certain 2018 Chevrolet Silverado 1500, GMC Sierra 1500, 2018-2019 Chevrolet Silverado 2500, 3500, and GMC Sierra 2500, 3500 Crew Cab trucks. The left or right-side roof-rail air bag (RRAB) inflator end cap may detach from the inflator or the inflator sidewall may rupture.

  Risk: A separated inflator end cap or inflator rupture can allow compressed gas to escape, resulting in the end cap or other components being propelled into the vehicle, increasing the risk of injury or crash.

  Fix: Dealers will replace the left and right side RRAB modules, free of charge. Owner notification letters were mailed November 8, 2024. Owners may contact Chevrolet customer service at [phone removed], and GMC Customer Service at [phone removed]. GM's number for this recall is N242474500.

• Service Brakes, Hydraulic:Power Assist:Vacuum

  Oct 2020 · #20V603000

  General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine.

  Read more: details, risk and fix

  General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine. The output of the mechanical vacuum pump can decrease over time, decreasing the amount of vacuum/power brake assist.

  Risk: A decrease in brake assist can increase the brake pedal effort and distance required to stop the vehicle, increasing the risk of a crash.

  Fix: GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began November 11, 2020. Owners may contact GM customer service at [phone removed], Cadillac customer service at [phone removed] or Chevrolet customer service at [phone removed]. GM's number for this recall is N202300860.

• Service Brakes, Hydraulic:Antilock/Traction Control/Electronic Limited Slip:Wheel Speed Sensor/Tone Ring

  Oct 2019 · #19V761000

  General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive.

  Read more: details, risk and fix

  General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.

  Risk: Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.

  Fix: GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at [phone removed] or GMC customer service at [phone removed]. GM's number for this recall is N192261050.

• Service Brakes, Hydraulic:Power Assist:Vacuum

  Sep 2019 · #19V645000

  General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles.

  Read more: details, risk and fix

  General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.

  Risk: As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.

  Fix: GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at [phone removed], Cadillac customer service at [phone removed] or GMC customer service at [phone removed]. GM's number for this recall is N192268490.

Owner complaints by area

Reports owners filed with NHTSA. They aren't verified, and one complaint can mention more than one area. Tap an area to read the most recent ones.

• Power Train130

  4 involved a crash

  • Filed Sep 2026

    Vehicle purchased Certified Pre-Owned in October of 2021 with roughly 43,000 miles. During the first service (47,598 miles) at a GM dealer I reported very hard shifts, but this issue was ignored during service. At the next servce (54,571 miles) I again reported the hard shifts and "surging" when coming to a stop but the dealer reported they were unable to replicate the issue and did not address it. At the next service (61,620 miles) I reported the issues with the transmission once again and this time they performed a transmission fluid flush/replacement, acknowledging the issue and asking me to drive for 200 miles and return if the issue was not fixed. I returned at 62,058 miles as the issue was not resolved and they replaced the torque converter. During my next visit (68,709 miles) I reported the issue was still present but was informed they would not address it as I was now outside of warranty. I reported this to GM but was told to pay for a diagnostic and repair and "hope" that the dealer would elect to cover it.

  • Filed Sep 2026 · Also filed under Suspension

    Unknown

  • Filed Sep 2026 · Also filed under Engine

    I own a 2018 GMC Sierra 1500 V8 5.3 liter which is at 46, 433 miles. Over the past few weeks I have noticed the transmission having difficulty shifting in first gear and lurching, and making shuddering noises, and as well making a constant ticking noise. After an experienced mechanic had put a diagnostic system onto my truck, his system diagnosed a Transmission Lifter Failure, specifically 2 out of the 8 lifters. A few days later (9-04-26) I took my truck to a certified GMC servicing business (Patriot Chevrolet of Hopkinsville KY [phone removed]) and had a transmission servicing done. I had told the Customer Service representative [name removed] about the ticking and that I thought 2 lifters going bad in the transmission were the source of it. 3 hours later the servicing was done which cost 474.43. She did not know if the ticking had stopped or not. I started my engine to head home and the ticking was still happening. Nothing had changed. I got home, parked and have not started the engine since to minimize any further damage. I have become aware that this year, make and model has become infamous for the engine/transmission design and parts failure which has been at the center of thousands of class action lawsuits. I have owned this vehicle since inheriting it from my late father for 2 months before he developed dementia and suffered a broken hip. I have religiously had the oil changed every three months regardless of the mileage, and this is a sealed transmission which cannot be worked on by someone but a certified GMC mechanic, which wasn't a worry because the truck's manual says doesn't need to be worked on unless there seem to be problems. Which is what I did on 9-4-26, hoping that a servicing would fix the issue. During the 5 years that I have owned this truck, I never received ANY sort of notice from GMC that might've hinted at possible Transmission Failures, though GMC has been totally aware of. Sudden power loss dangerous and unfairly expensive to drivers.

  • Filed Sep 2026

    Within the first 3 years of purchase as a new vehicle, my 2018 GMC Sierra Denali equipped with the GM 8L90 automatic transmission developed a pronounced judder during light acceleration, resembling driving over rumble strips. The condition was first reported to an authorized GMC dealer on October 23, 2021, at 26,648 miles while the powertrain warranty was in effect. GM authorized a transmission-fluid exchange from the technical service bulletin (TSB) 18-NA-355, dated April 2020, but that repair did not provide a lasting correction. The condition continued, and in 2026 the authorized dealer diagnosed an “internal stator issue causing judder on light acceleration” and recommended replacement of the torque converter. We completed the repair and retained the removed converter. The defect affected the vehicle while accelerating and created concern about predictable power delivery when merging, entering traffic or crossing an intersection. Continued torque-converter malfunction can generate heat and debris, damage the transmission and potentially impair acceleration or power transfer. GM had issued technical bulletins addressing torque-converter shudder in 2018 Sierra vehicles before this truck was purchased, but there has been no recall. I request that NHTSA evaluate whether this recurring defect presents an unreasonable safety risk in GM vehicles equipped with the 8L90 transmission.

  • Filed Sep 2026

    Automatic Transmission not shifting properly unable to accelerate bangs gears while shifting noises from the transmission not reported no warning lamps

  • Showing the 5 most recent of 130.
• Engine67

  • Filed Sep 2026

    I was backing out of my garage and truck made strange noise and shut off . Tried to restart but just made ding and wouldn't turn over . Dash lights went blank. Had vehicle towed to shop and mechanic stated it was crank and connecting rods after he dropped the oil pan. I ordered new OEM engine and waiting on delivery . Been 5 weeks now since order . Vehicle only has 106,000 miles on it and have had it since 20,000 miles and all maintenance has always been done . Engine can be inspected at shop as new engine has not arrived

  • Filed Sep 2026

    CUSTOMER STATES: THINKS CRANKSHAFT PULLEY IS LOOSE DUE TO PRIOR WATER PUMP REPLACEMENT-CRACKSHAFT PULLEY HAS NOTHING TO DO WITH WATER PUMP REPLACEMENT. BEFORE INSPECTING/STARTING ENGINE VERIFIED OIL LEVEL-OIL LEVEL IS ON FULL MARK. STARTED ENGINE-LOUD RATTLING/KNOCKING NOISE FROM ENGINE-ENGINE HAS INTERNAL FAILURE-ENGINE REPLACEMENT IS REQUIRED. ALSO HEARING NOISE IN REAREND-CANNOT TEST DRIVE DUE TO ENGINE CONDITION SEVERAL TSB'S ON ENGINE FAILURES WITH 6.2L ENGINES. GM HAS POSSIBLE RECALLS COMING ON 2019-2024 YR MODELS. NOT SURE IF EARLIER MODELS MAYBE INCLUDED UNDERHOOD INSPECTION 1 7003186 06NS 52.50 52.50 LBR-DISC CUST SAT

  • Filed Sep 2026 · Also filed under Power Train

    I own a 2018 GMC Sierra 1500 V8 5.3 liter which is at 46, 433 miles. Over the past few weeks I have noticed the transmission having difficulty shifting in first gear and lurching, and making shuddering noises, and as well making a constant ticking noise. After an experienced mechanic had put a diagnostic system onto my truck, his system diagnosed a Transmission Lifter Failure, specifically 2 out of the 8 lifters. A few days later (9-04-26) I took my truck to a certified GMC servicing business (Patriot Chevrolet of Hopkinsville KY [phone removed]) and had a transmission servicing done. I had told the Customer Service representative [name removed] about the ticking and that I thought 2 lifters going bad in the transmission were the source of it. 3 hours later the servicing was done which cost 474.43. She did not know if the ticking had stopped or not. I started my engine to head home and the ticking was still happening. Nothing had changed. I got home, parked and have not started the engine since to minimize any further damage. I have become aware that this year, make and model has become infamous for the engine/transmission design and parts failure which has been at the center of thousands of class action lawsuits. I have owned this vehicle since inheriting it from my late father for 2 months before he developed dementia and suffered a broken hip. I have religiously had the oil changed every three months regardless of the mileage, and this is a sealed transmission which cannot be worked on by someone but a certified GMC mechanic, which wasn't a worry because the truck's manual says doesn't need to be worked on unless there seem to be problems. Which is what I did on 9-4-26, hoping that a servicing would fix the issue. During the 5 years that I have owned this truck, I never received ANY sort of notice from GMC that might've hinted at possible Transmission Failures, though GMC has been totally aware of. Sudden power loss dangerous and unfairly expensive to drivers.

  • Filed Aug 2026 · Also filed under Steering

    Head gasket failure and overheating. After fixed, power steering has just failed during driving. Will have to have it towed to shop

  • Filed Jul 2026 · Also filed under Forward Collision Avoidance

    ENGINE FAILURE, 5/3/22, 23,987 MILES, ALL LIFTERS WAS REPLACED UNDER WARRANTY, ENGINE FAILURE, 7/6/26, 46004 MILES, TOOK TRUCK IN FOR OIL CHANGE AND WHEN RETURNED HAD A TICKING NOISE. DEALERSHIP NOTIFIED ME THAT CAMSHAFT ISSUES AND METAL DETECTED IN OIL. ENGINE NEEDS REPLACED. 6.2 V8 2018. TURPIN MOTORS, GENESEO, IL HAS DONE ALL SERIVCE ON TRUCK. NO WARNING LIGHTS OR CODES. VEHICLE IS IN MY GARAGE AND AVAILABLE FOR INSPECTION. I OPENED CASE WITH GM #105652237. DEALERSHIP OPENED CASE ON GM PORTAL ALSO. RESPONSE FROM GM IS THAT TRUCK IS OUT OF WARRANTY

  • Showing the 5 most recent of 67.
• Service Brakes44

  2 involved a crash

  • Filed Aug 2026 · Also filed under Electrical System

    There was a mass recall on 2018 GMC Sierras to due to a faulty break pump vaccum. We are experiencing the same problems but for some reason were not included in the recall. We were told to reach out on here as others have to see what can be done as this is a saftety hazard.

  • Filed Jun 2026 · Also filed under Steering, Engine

    Incident description: On three occasion I have had the same catastrophic Engine failure putting myself and my family along with the general public in harms way. Starting March of 2022 while driving at approximately 60 MPH on the West Shore Expressway my truck experienced a sudden and total loss of motor power. My engine stalled out and I lost my ability to safety steer and stop my vehicle. This all happened during rush hour while driving in the left lane of traffic. This sudden loss of power forced me to maneuver the vehicle to the right shoulder of the expressway across the right lane of traffic. As there was no shoulder to pull over on the left side of the highway. This created an immediate crash risk for myself and other drivers. Upon inspection at the authorized GMC dealership where I purchased the truck new, a certified mechanic determined that the engine experienced a complete failure requiring replacement or rebuilding of the engine. I paid to have the engine rebuilt at the dealership. The second instance was similar to the above incident. Once again I paid for the repair. The third instance was more dangerous as when my trucks engine failed it almost caused an accident. As of today my truck is still sitting in the dealership for over 6 months and no one from the dealership or manufacturer will give me an answer on what has to be done now. This patter of sudden repeated engine failure clearly indicates a systemic safety defect that extends beyond normal wear and tear. I urge the NHTSA to open a defect investigation into the 2018 GMC Sierra 1500 engine systems.

  • Filed May 2025 · Also filed under Hydraulic

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while depressing the brake pedal, the brake pedal displayed more resistance than expected, causing the contact to have to apply more pressure while depressing the brake pedal. The contact stated that the braking distance was extended due to the failure. The vehicle was taken to the dealer who diagnosed that the brake vacuum pump had failed and needed to be replaced. The vehicle was not repaired. The contact became aware of NHTSA Campaign Number: 19V645000 (Service Brakes, Hydraulic); however, the VIN was not included. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 75,000.

  • Filed May 2025 · Also filed under Hydraulic

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, while depressing the brake pedal to slow down, the brake pedal lost pressure, and the vehicle experienced a reduction in braking power. The contact had to depress the brake pedal with additional force to properly slow the vehicle. There was no warning light illuminated; however, the message "Brake Assist" was displayed on the instrument panel. The local dealer was not contacted, and the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 135,000.

  • Filed Feb 2025

    I noticed there was an issue regarding the break assist system in my vehicle a few months ago when I went to go for a drive. It is available to be inspected. The issue regarding safety revolves around the difficulty to break. The low amount of brake availability is dangerous in the case of a situation that if I needed to break quickly it is extremely difficult to. I have not had a certified individual confirm the issue at this time. It has not been inspected. The warning message "Break Assist" comes up every time I try to utilize the brakes. I know there are previous recalls, although when I have tried to see if my truck falls under those recalls it does not.

  • Showing the 5 most recent of 44.
• Electrical System43

  1 involved a fire

  • Filed Aug 2026 · Also filed under Service Brakes

    There was a mass recall on 2018 GMC Sierras to due to a faulty break pump vaccum. We are experiencing the same problems but for some reason were not included in the recall. We were told to reach out on here as others have to see what can be done as this is a saftety hazard.

  • Filed Mar 2026 · Also filed under Steering, Suspension

    1. Electronic power steering modular issue. My 2018 GMC SEIRRA 1500 CREW CAB JUST LOST ALL POWER STEERING. THEN WHEN I PARK IT. Assist notifications come on, ABS notices, BRAKE light stays on, trailer/tow notifications, trailer assist, parking brake, etc SUDDENLY A LOUD thump & feels like the whole truck just drops like 5” inches, settling. I cannot afford an inspection (ID theft in 2025, compromised all accts & all credit cards) BUT. It IS available as long as cost is covered by YOU !! 2. Lucky it happened in a grocery store parking lot. However not expecting power steering to go out, almost hit a pedestrian. 3. No it has not Ben inspected yet I can’t afford the bill 4. No it has not been reported what for I didn’t hit anybody and the cops in this area they could give her rats ass they don’t make a report the question you like you’re like a criminal. 5. No warnings or anything until it happened that day leaving the grocery store. There is absolutely no notification it was gonna happen. It ran fine when I parked it to grocery shop Come back out & I could barely back out to leave. I can lift up my had fatboy if needed so I’m sure turning a steering wheel…. lol Thnx a lot If I could figure out what part needs to be changed out or you could cover the parts needed. I do work in cars or have in the past, I don’t like the new ones, but this seems simple enough if I knew exactly what part I needed to pull out change out or I see that there’s recalls on previous vehicles and GMC after2020- 24 but I don’t see 2018 didn’t happen so I like to say whoever created that electronic steering can take that module along with the harness and they know exactly where they can put it don’t they I’m just saying as a used to be not sure now a GMC supporter, but I’m starting to think twice now if I

  • Filed Oct 2025

    Odometer Fraud. The contact purchased a 2018 GMC Sierra 1500. The contact discovered that there was a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 72,000. It was later discovered later that the mileage was 241,556.

  • Filed Aug 2025 · Also filed under Steering, Engine

    2018 GMC Sierra SLT's electric power steering suddenly stopped working, I almost got killed this issue has been reported by other owners

  • Filed Aug 2025

    The contact owns a 2018 GMC Sierra 1500. The contact stated that the battery had been replaced three times since 2018. The vehicle was taken to the dealer; however, the failure was not duplicated. The contact referenced an unknown recall; however, the VIN was not associated with the recall. In addition, the contact stated that the first battery was replaced a month after the vehicle was purchased, and the second battery was replaced three weeks after the first replacement. The contact stated that the third battery was replaced a day after the second battery replacement. The manufacturer was made aware of the failure and a case was filed. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 36,000.

  • Showing the 5 most recent of 43.
• Steering30

  1 involved a crash

  • Filed Aug 2026 · Also filed under Engine

    Head gasket failure and overheating. After fixed, power steering has just failed during driving. Will have to have it towed to shop

  • Filed Jun 2026

    Power steering went out for 2-3 seconds as I was making a turn into a street , this happened twice to be exact

  • Filed Jun 2026 · Also filed under Service Brakes, Engine

    Incident description: On three occasion I have had the same catastrophic Engine failure putting myself and my family along with the general public in harms way. Starting March of 2022 while driving at approximately 60 MPH on the West Shore Expressway my truck experienced a sudden and total loss of motor power. My engine stalled out and I lost my ability to safety steer and stop my vehicle. This all happened during rush hour while driving in the left lane of traffic. This sudden loss of power forced me to maneuver the vehicle to the right shoulder of the expressway across the right lane of traffic. As there was no shoulder to pull over on the left side of the highway. This created an immediate crash risk for myself and other drivers. Upon inspection at the authorized GMC dealership where I purchased the truck new, a certified mechanic determined that the engine experienced a complete failure requiring replacement or rebuilding of the engine. I paid to have the engine rebuilt at the dealership. The second instance was similar to the above incident. Once again I paid for the repair. The third instance was more dangerous as when my trucks engine failed it almost caused an accident. As of today my truck is still sitting in the dealership for over 6 months and no one from the dealership or manufacturer will give me an answer on what has to be done now. This patter of sudden repeated engine failure clearly indicates a systemic safety defect that extends beyond normal wear and tear. I urge the NHTSA to open a defect investigation into the 2018 GMC Sierra 1500 engine systems.

  • Filed Mar 2026 · Also filed under Suspension, Electrical System

    1. Electronic power steering modular issue. My 2018 GMC SEIRRA 1500 CREW CAB JUST LOST ALL POWER STEERING. THEN WHEN I PARK IT. Assist notifications come on, ABS notices, BRAKE light stays on, trailer/tow notifications, trailer assist, parking brake, etc SUDDENLY A LOUD thump & feels like the whole truck just drops like 5” inches, settling. I cannot afford an inspection (ID theft in 2025, compromised all accts & all credit cards) BUT. It IS available as long as cost is covered by YOU !! 2. Lucky it happened in a grocery store parking lot. However not expecting power steering to go out, almost hit a pedestrian. 3. No it has not Ben inspected yet I can’t afford the bill 4. No it has not been reported what for I didn’t hit anybody and the cops in this area they could give her rats ass they don’t make a report the question you like you’re like a criminal. 5. No warnings or anything until it happened that day leaving the grocery store. There is absolutely no notification it was gonna happen. It ran fine when I parked it to grocery shop Come back out & I could barely back out to leave. I can lift up my had fatboy if needed so I’m sure turning a steering wheel…. lol Thnx a lot If I could figure out what part needs to be changed out or you could cover the parts needed. I do work in cars or have in the past, I don’t like the new ones, but this seems simple enough if I knew exactly what part I needed to pull out change out or I see that there’s recalls on previous vehicles and GMC after2020- 24 but I don’t see 2018 didn’t happen so I like to say whoever created that electronic steering can take that module along with the harness and they know exactly where they can put it don’t they I’m just saying as a used to be not sure now a GMC supporter, but I’m starting to think twice now if I

  • Filed Aug 2025 · Also filed under Electrical System, Engine

    2018 GMC Sierra SLT's electric power steering suddenly stopped working, I almost got killed this issue has been reported by other owners

  • Showing the 5 most recent of 30.
• Unknown or Other25

  2 involved a crash · 1 involved a fire

  • Filed Mar 2026

    I’ve owner the vehicle since new. My A/C condenser has failed 3 times, meaning I’m now about to be on my 4th. The welds are weak and it cracks in the same spot 95% of the time. It should last more than a 2 year average.

  • Filed Mar 2026

    Premature frame rot

  • Filed Aug 2025

    The truck started to vibrate or shudder . We are having to deal with replacing the transmission on our truck, which has only 45,000 miles on it. We have noticed numerous complaints about transmission problems with this model and the place that is replacing the transmission said they have had 3 customers in the last couple of months with the same issue on the same GMC model. This is a lot for our small town and area. Why hasn't GMC issued recalls ?

  • Filed May 2025 · Also filed under Power Train, Air Bags

    The transmission would purge forward when shifting gears. The shifting was very rough. This vehicle had recently been in accident.

  • Filed Apr 2025 · Also filed under Power Train, Engine

    I have taken it in due to engine mounts 4 different times, transmission replaced and in October 2024 I took it in for issues I was experiencing like I had before my transmission went out. I did not get my truck back until almost Dec 2024 and that was due to there employee backing into the front end of my truck. So after all that my warranty was up Dec 24 2024 and then on April 16th 2025 I was driving my 2018 GMC Sierra 6.2l 1500 Denali 129,600 miles at approx 30 mph it was late so the streets were empty and we started to hear a knocking or what I thought at the time was a very bad exhaust leak. We parked and then we started to try to make it home very slowly which we did and it was not making to much noise. The next day I called GMC and explained they said bring it in. I towed it there to be safe but it did start and still ran at very slow speed. They called me and said that the lift side rockers/ lifters 1 failed and it was stuck due to a misfire and that the engine would need to be rebuilt and sent me over some very vague break down which looked like a lump sum price. I requested and better break down and got a screen shoot and that when he said that’s the best they can do. There were no engine lights on or warnings nothing at all. It also just got serviced at GMC for an oil change on February 27th 2025 along with some air filters. Today is April 29th and still waiting for the service manage to call and see if they can do anything to help out instead of charging full price. I will Attach pictures of the cost break down if possible. Thank you

  • Showing the 5 most recent of 25.
• Suspension11

  1 involved a crash

  • Filed Sep 2026 · Also filed under Power Train

    Unknown

  • Filed May 2026 · Also filed under Power Train

    The transmission has always been rough. It has now gone out at 75,000 miles. This transmission issue really seemed to get worse about 50,000 miles. But when I called the dealer, they said they were backed up and couldn't get to it for 9-12 weeks (Covid excuses at that point). Then, it really had an issue going down a large grade into [XXX] . But the issues seemed fairly intermittent. I had an independent shop who said it was hard to tell if it was intermittent. They didn't find metal shavings at the time. ADDITIONALLY, it has also always been a little rough driving. A mechanic looking at it today told me there are no sway bar links at all. This truck has not been modified. This had to have come off the line faulty. Among all the other things. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

  • Filed Mar 2026 · Also filed under Steering, Electrical System

    1. Electronic power steering modular issue. My 2018 GMC SEIRRA 1500 CREW CAB JUST LOST ALL POWER STEERING. THEN WHEN I PARK IT. Assist notifications come on, ABS notices, BRAKE light stays on, trailer/tow notifications, trailer assist, parking brake, etc SUDDENLY A LOUD thump & feels like the whole truck just drops like 5” inches, settling. I cannot afford an inspection (ID theft in 2025, compromised all accts & all credit cards) BUT. It IS available as long as cost is covered by YOU !! 2. Lucky it happened in a grocery store parking lot. However not expecting power steering to go out, almost hit a pedestrian. 3. No it has not Ben inspected yet I can’t afford the bill 4. No it has not been reported what for I didn’t hit anybody and the cops in this area they could give her rats ass they don’t make a report the question you like you’re like a criminal. 5. No warnings or anything until it happened that day leaving the grocery store. There is absolutely no notification it was gonna happen. It ran fine when I parked it to grocery shop Come back out & I could barely back out to leave. I can lift up my had fatboy if needed so I’m sure turning a steering wheel…. lol Thnx a lot If I could figure out what part needs to be changed out or you could cover the parts needed. I do work in cars or have in the past, I don’t like the new ones, but this seems simple enough if I knew exactly what part I needed to pull out change out or I see that there’s recalls on previous vehicles and GMC after2020- 24 but I don’t see 2018 didn’t happen so I like to say whoever created that electronic steering can take that module along with the harness and they know exactly where they can put it don’t they I’m just saying as a used to be not sure now a GMC supporter, but I’m starting to think twice now if I

  • Filed Jun 2024 · Also filed under Steering

    I have a 2018 GMC Sierra 1500 that I bought new in Oct of 2018 and it now has 15,756 miles on it and was still like new at the time of failure. On May 23rd I was driving the truck when the driver suspension suddenly had an structural failure (mostly the ball joint coming out of the control arm) causing the front right side of the suspension to collapse while driving. This caused the truck to go left of center into on coming traffic resulting in a traffic accident.

  • Filed Apr 2024

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while the vehicle was at an independent mechanic for an oil change, the independent mechanic performed a full inspection of the vehicle. The contact was informed that the CV axles were corroded, and the CV axles needed to be replaced. The vehicle was repaired. The contact was advised to report the failure to the dealer. The contact informed the dealer of the failure. The contact stated that the vehicle had been taken back to the dealer several times for repairs, including the transmission replacement, radiator replacement, and a full suspension replacement. The manufacturer was made aware of the failure. The failure mileage was approximately 93,555.

  • Showing the 5 most recent of 11.
• Fuel/Propulsion System10

  1 involved a crash · 1 involved a fire

  • Filed Jul 2025 · Also filed under Power Train, Engine

    I own a $35,000 2018 gmc Sierra 1500 6.2l V8 4x4 Denali, which is currently down due to engine failure while I was driving down the road.. never had a check engine light on the dash. Haven't had the truck a year before it quit. Rods knocking, crankshaft bearings, loss of power, high rpm with little acceleration. I could have the peddle down to the floor and would barely get to 20 mph.. the motor would jump so bad, you would think it's going to jump out the truck. I have replaced several parts on the truck, including oil pump, filter, solenoid valve sensor, fuel pump, injectors, and sensors, battery, starter a couple times. Did all that replacing for it to get worse and finally quit while driving.. I was stranded in the middle of the road.. IV reported it to the Recall people, but nothing helped. I have taken my vehicle to Express Chevrolet and they did a diagnostic test, which I provided the list they gave me below. When I took it to them, I was using Endurance Warranty, but they denied my claim due to the issues and they didn't cover them. At the time, the motor was still jumping, but smoke was coming out the tailpipe extremely bad, the truck was jerking and jumping. After replacing everything I listed, the truck got worse, started screeching and knocking loudly, loss of engine power, little acceleration. The day the motor quit on me while driving, I got the mph up to about 55-60 and it just quit, and hasn't started back since.

  • Filed Feb 2025 · Also filed under Electrical System, Unknown or Other

    On February 10, 2025 the vehicle, a 2018 GMC Sierra, caught on fire while parked in the driveway of my home. The vehicle had last been driven earlier in the day with a return to home at approximately 12:45pm. At approximately 7pm I heard a loud pop outside of my home and saw orange light coming through the front windows. Upon going outside, I found the rear of the vehicle engulfed in flames. The fire was coming out around the remains of the license plate, up and around the rear bumper on the left side, and progressing up the tailgate and window hatch on the bed cap. The fire progressed forward over the next few minutes as the fiberglass cap burned. Eventually the fire penetrated the front window of the cap and rear window of the cab and began burning the interior of the cab. About the time the fire department arrived the fuel tank ruptured and began spilling gasoline onto the ground beneath the vehicle. The fuel tank was approximately 7/8 full. The fire department eventually extinguished the fire, but the vehicle was a total loss. My wife and I had been in close vicinity of the vehicle during the afternoon hours and had noticed nothing unusual. There had been no unusual issues with the vehicle during the prior drive, which had been a 5 minute drive to/from a local home supply store. There was collateral damage to the front of my house as a result of the heat from the fire, as well as damage to the driveway. If the vehicle had been parked in the garage it is resonable to assume that the house would have been destroyed.

  • Filed Dec 2024 · Also filed under Engine

    This vehicle has 88400 miles, it out of warranty, which I know this, I use AMSOIL ASM SIG SERIES SYN SAE 0W-20 , 5.3L GAS. TWO YEARS AGO, I CHANGED OIL AT RICHARD BUICK GMC IN DAYTON, OH AND SENT A SAMPLE OF THE OIL TO OIL ANALYZERS FOR AN ANALYSIS, THEY SET IT BACK, IT SHOWED THERE WAS A LEVEL 4 SEVERE GASOLINE IN THE OIL. THEY CHANGED THE HIGH SPEEP FULE PUMP, BOTH IN JECTORS, AND IT THOUGHT IT WAS FIXED, ON 12 - 11 -24 HAD THE OIL CHANGED AT LOCAL BOYS SERVICE CENTER, SENT A SAMPLE OF THE OIL-TO-OIL ANALYZERS AND RECIEVED BACK, A SEVERE FUEL LEAK OF GASOLINE IN THE OIL, i DON'T THINK THAT MANY DRIVERS WHO HAVE THIS VEHICLE KNOW ABOUT THIS DANGEROUS PROBLEM, IT COULD CAUSE AN ENGINE FAILURE OR EVEN WORSE, GENERAL MOTORS NEEDS TO FIX THIS PERBLEM.

  • Filed Nov 2022

    Gas leak. My 2018 gmc sierra 1500 has been giving me two codes for evap leak small and large and i notice a black spot on my drive way under the gas tank wich in fact was gas. I can see the gas tank is wet but it comes from the top part of the gas tank. I been looking for recalls on this but there isnt any for this specific year of GMC sierra 1500 slt.

  • Filed Aug 2022 · Also filed under Vehicle Speed Control, Engine

    THE SPEED OF THE TRUCK WILL NOT INCREASE. THE RPMS GOES REALLY HIGH AND THE TRUCK WILL NOT MOVE INTO THE NEXT GEAR. THE REAR END OF TRUCK VIBRATES. I TOOK THIS TO THE DEALER AND WAS TOLD IT IS THE TRANSMISSION FLUID IS FAULTY. THE CHECK ENGINE LIGHT DOES COME ON. I DID NOT HAVE THE NEW TRANSMISSION FLUID CHANGED BECAUSE DEALER SAID IS COST $300 FOR THE FLUID AND $100 FOR THE LABOR AND $168 FOR THE DIAGNOSTICS. SO I STILL HAVE THE SAME PROBLEM. ALSO TOLD YOU CAN NOT PURCHASE THIS TRANSMISSION FLUID NO WHERE BUT GMC.

  • Showing the 5 most recent of 10.
• Air Bags8

  4 involved a crash

  • Filed Mar 2026

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving approximately 45 MPH on bumpy terrain, the driver’s and passenger’s side curtain air bags deployed unexpectedly. No warning light was illuminated, and there was no impact to the vehicle to cause the air bags to deploy. The vehicle was taken to a local independent mechanic, where it remained for further investigation. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 80,000.

  • Filed May 2025 · Also filed under Power Train, Unknown or Other

    The transmission would purge forward when shifting gears. The shifting was very rough. This vehicle had recently been in accident.

  • Filed Jul 2024

    all side airbags deployed for no reason on my driveway at a speed of less than 15 miles per hour. the front airbags did not deploy. no accident. no damage.

  • Filed Oct 2023

    Both passenger and driver airbags located behind front seats/where Seatbelt is located blew during a collision, seatbelt locked us in during impact,the cab of the truck filled with white smoke and smelt like an electric fire during impact. problem will be confirmed by a collision center and insurance this week. There’s a lamp warning on the dash board that says there’s a safety warning.

  • Filed Jun 2021 · Also filed under Electrical System

    Check engine came on and says manufacture specific issues/codes. Safety restrain system. P10e4

  • Showing the 5 most recent of 8.
• Wheels7

  • Filed Apr 2023 · Also filed under Steering, Suspension

    Noticed a scraping noise after new, recommended tires installed on my stock truck. Checked the door label to ensure correct tires installed, they were, returned to the tire facility and they recommended I ask a repair facility to investigate. Found that the tires are rubbing the upper control arm when fully turned left or right (both sides affected). Went online to discover that this is a common issue with the 2018 and similar GMC Sierra and Chevy Silverado trucks. This is a safety issue caused by a design deficiency. Two things can happen. One, the tire can fail. Two, the upper control arm could fail, causing the vehicle to be uncontrollable. This could be fixed by restricting the extreme left and right travel in the steering system or redesigning and replacing the upper control arm so it doesn’t interfere with the tire. This is an unacceptable safety issue caused by a design deficiency and needs to be addressed by NTSB now.

  • Filed Jul 2022 · Also filed under Electrical System, Forward Collision Avoidance

    The light in the dashboard gose dark and it gives me a warning collision alert and the tiers they spin out of control when turning or when I I’m driving I think it’s the tiers they have a lot of tread still…

  • Filed Jan 2022

    Purchased 2018 truck new from dealer on 2/19. Came with 20" rims and the spare tire is on a17"rim. Currently, there is a GM recall # N212346510 and NHTSA campaign #21V985000 for this issue. My truck is not included. Hazard: Based on failure of the anti-lock braking system when operating vehicle with three 20" rims and one 17" spare my vehicle should be include in the recall.

  • Filed Dec 2019 · Also filed under Power Train, Structure

    I OWN A GMC SIERRA WHICH IS 14 MONTHS OLD, PURCHASED IN DUBAI UAE FROM ALGHANDI AUTO. THE LAST SERVICE FOR 40000 KMS WAS DONE ON AUGUST 8TH, 2019 AND NO PROBLEM WAS HIGHLIGHTED EXCEPT THE BATTERY THAT WAS SUBSEQUENTLY CHANGED. ON FRIDAY EARLY MORNING (SEP 27, 2019), WE HAVE ESCAPED A MAJOR ACCIDENT ON SHEIKH ZAYED ROAD ON ACCOUNT OF THE FRONT WHEEL AXLE THAT JUST BROKE/CAME APART WHILE DRIVING, CAUSING THE FRONT RIGHT WHEEL TO DETACH FROM THE VEHICLE, SUBSEQUENTLY SKIDDING TO THE RIGHT CAUSING MAJOR DAMAGE TO THE SUSPENSION AND MANY OTHER PARTS IN THE VEHICLE. THIS COULD HAVE CAUSED EVEN DEATH OF MY SON WHO WAS DRIVING THE VEHICLE. I WOULD APPRECIATE AN IMMEDIATE CALL FROM YOUR OFFICE TO RESOLVE THIS AS I AM NO LONGER INTERESTED IN DRIVING THIS CAR THAT CAN COST ME & MY FAMILY OUR LIVES. THIS NEEDS TO BE DONE IMMEDIATELY AS I WOULD OTHERWISE BE IN THE PROCESS OF SEEKING LEGAL ADVICE AGAINST GMC. *JB

  • Filed Dec 2019

    THE FACTORY WHEELS DO NOT GRIP THE ROAD. THIS WAS FROM DAY 1 OF GETTING IT BRAND NEW FROM THE DEALER. THIS HAS LED TO SPINNING THE TIRES, FISHTAILING, AND SLIDING WHILE BRAKING. THIS HAPPENS WITH EVEN MODERATE AMOUNTS OF PUSHING THE GAS PEDAL OR BRAKING WELL AHEAD OF A SLOW DOWN OR STOP IN TRAFFIC IN FRONT OF YOU. THIS IS VERY DANGEROUS AND TAKES AWAY THE DRIVERS ABILITY TO MANEUVER AS WE SHOULD.

  • Showing the 5 most recent of 7.
• Forward Collision Avoidance6

  • Filed Jul 2026 · Also filed under Engine

    ENGINE FAILURE, 5/3/22, 23,987 MILES, ALL LIFTERS WAS REPLACED UNDER WARRANTY, ENGINE FAILURE, 7/6/26, 46004 MILES, TOOK TRUCK IN FOR OIL CHANGE AND WHEN RETURNED HAD A TICKING NOISE. DEALERSHIP NOTIFIED ME THAT CAMSHAFT ISSUES AND METAL DETECTED IN OIL. ENGINE NEEDS REPLACED. 6.2 V8 2018. TURPIN MOTORS, GENESEO, IL HAS DONE ALL SERIVCE ON TRUCK. NO WARNING LIGHTS OR CODES. VEHICLE IS IN MY GARAGE AND AVAILABLE FOR INSPECTION. I OPENED CASE WITH GM #105652237. DEALERSHIP OPENED CASE ON GM PORTAL ALSO. RESPONSE FROM GM IS THAT TRUCK IS OUT OF WARRANTY

  • Filed Apr 2025 · Also filed under Steering, Electrical System

    While driving my truck and making low speed turns the dashboard (including center console) cuts off, along with my power steering. The truck has also shut off completely making u-turns causing me to almost crash. This also happened while driving around 60mph on the freeway, the entire dashboard went out, loss of steering, and truck shut off, almost causing an accident. When it does happen, it will cut out in 1 second intervals and steering will work again for 2 seconds then cut out again for 1 second, this causing me to stall. There are no check engine lights, or service lights that stay on. However, I will get a message stating: You are memory setting 3 in the system (wording may be different). In some cases the stabilitrak light will come on, the park assist warning stating it shut off comes on dash, and trailer break. I have a full service AUL warranty and had vehicle checked at certified dealership and no codes were recorded. I replaced battery and the problem is still happening. This is unsafe and should be part of the previous recall as my symptoms are the same exact symptoms as the other 2018 recall.

  • Filed Jul 2024 · Also filed under Power Train

    Drive train:The truck suddenly lurches forward as I'm accelerating and after I've stopped. It's very scary to stop behind a vehicle and suddenly lurch forward. Thankfully, I don't stop too close to another vehicle. The truck also shudders and experiences significant delays in acceleration after coming to a stop and going again. Automatic Emergency Braking: the automatic emergency braking system spontaneously brakes as I'm driving when there is nothing in front of me. Thankfully, nobody has been following behind me when this happens yet. I had to turn the automatic braking system off in order to avoid being hit.

  • Filed Jan 2023 · Also filed under Service Brakes

    Braking vehicle will cause brake pedal to vibrate and become soft while pressing it and requires more effort to stop vehicle. Service brake assist light laminates on info system. I know there is a recall for this currently but my vehicle is not listed for this all though i have the same issues. Recall is N202300860.

  • Filed Jul 2022 · Also filed under Electrical System, Wheels

    The light in the dashboard gose dark and it gives me a warning collision alert and the tiers they spin out of control when turning or when I I’m driving I think it’s the tiers they have a lot of tread still…

  • Showing the 5 most recent of 6.
• Structure6

  1 involved a crash

  • Filed May 2026

    Paint flaking top above windshield within one year of ownership! Paint flaking on left rear door within last month!

  • Filed May 2021

    I LEFT HOME TO GO TO THE STORE. WHILE DRIVING ON THE HIGHWAY MY SUNROOF EXPLODED. THERE WERE NO CARS OR TRUCK IN FRONT OF ME OR PASSING ME. NOTHING HIT MY TRUCK. IT SOUNDED LIKE A SHOTGUN GOING OFF INSIDE THE TRUCK. THE SUNROOF EXPLODED SENDING GLASS EVERYWHERE. I WAS DRIVING ON A 5 LANE HIGHWAY, IT WAS RAINING, BUT NOT A BAD STORM. THE ROAD WAS STRAIGHT AND IN GOOD CONDITION. IT HAPPENED SO FAST I DID NOT KNOW WHAT WAS GOING ON. I PULLED INTO A GAS STATION TO CHECK MY TRUCK. I FOUND GLASS ALL IN THE BED OF THE TRUCK AND MOST OF THE SUNROOF GONE. I HAVE TAKEN IT TO THE DEALER AS THE TRUCK IS UNDER WARRANTY. I WAS TOLD THE WARRANTY DOES NOT COVER DAMAGE AND SO FAR NO ANSWER IT THEY WILL COVER IT. I HAVE HAD THE TRUCK FOR ALMOST 3 YEARS AND IT IS NEARING THE END OF THE WARRANTY.

  • Filed Apr 2021

    SPARE TIRE CRANK CABLE BROKE ALLOWING SPARE TIRE TO FALL OUT FROM UNDER THE TRUCK ON THE INTERSTATE AT 70 MPH. SPARE TIRE SLIDE BACKWARDS UNDER MY 5TH WHEEL CAMPER DAMAGING THE CAMPER AND FLYING OFF INTO THE HIGHWAY MEDIAN.

  • Filed Dec 2019 · Also filed under Power Train, Wheels

    I OWN A GMC SIERRA WHICH IS 14 MONTHS OLD, PURCHASED IN DUBAI UAE FROM ALGHANDI AUTO. THE LAST SERVICE FOR 40000 KMS WAS DONE ON AUGUST 8TH, 2019 AND NO PROBLEM WAS HIGHLIGHTED EXCEPT THE BATTERY THAT WAS SUBSEQUENTLY CHANGED. ON FRIDAY EARLY MORNING (SEP 27, 2019), WE HAVE ESCAPED A MAJOR ACCIDENT ON SHEIKH ZAYED ROAD ON ACCOUNT OF THE FRONT WHEEL AXLE THAT JUST BROKE/CAME APART WHILE DRIVING, CAUSING THE FRONT RIGHT WHEEL TO DETACH FROM THE VEHICLE, SUBSEQUENTLY SKIDDING TO THE RIGHT CAUSING MAJOR DAMAGE TO THE SUSPENSION AND MANY OTHER PARTS IN THE VEHICLE. THIS COULD HAVE CAUSED EVEN DEATH OF MY SON WHO WAS DRIVING THE VEHICLE. I WOULD APPRECIATE AN IMMEDIATE CALL FROM YOUR OFFICE TO RESOLVE THIS AS I AM NO LONGER INTERESTED IN DRIVING THIS CAR THAT CAN COST ME & MY FAMILY OUR LIVES. THIS NEEDS TO BE DONE IMMEDIATELY AS I WOULD OTHERWISE BE IN THE PROCESS OF SEEKING LEGAL ADVICE AGAINST GMC. *JB

  • Filed Jun 2019 · Also filed under Service Brakes

    MY 2018 GMC SIERRA SLT'S BREAK PEDAL BECOMES EXTREMELY DIFFICULT TO PRESS, AND I CAN HEAR SOMETHING THAT SOUNDS LIKE AIR COMING FROM THE PEDAL. THIS HAPPENS ESPECIALLY AT LOWER SPEEDS.THIS CAUSED ME TO CRASH INTO A CONCRETE WALL AND DAMAGE MY TRUCK. MY TRUCK HAS ONLY 10,000 MILES.

  • Showing the 5 most recent of 6.
• Engine And Engine Cooling6

  • Filed Jan 2026 · Also filed under Engine

    The contact owns a 2018 GMC Sierra 1500. While starting the vehicle, it was shaking violently, with reduced power. The vehicle was restarted and worked as designed. Upon research, the contact associated the failure with NHTSA Action Number: PE25001 (Engine and Engine and Cooling). The vehicle was taken to an independent mechanic who determined there was metal in the engine, and there was a misfire coming from cylinder #2. The mechanic recommended that the engine be replaced. There were loose wires from the ECM, and the failure halted after the mechanic secured the wires. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 150,000.

  • Filed Oct 2025

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while attempting to accelerate from a stoplight, the vehicle hesitated before accelerating. A day later, the failure reoccurred, and the RPMs increased before the vehicle accelerated. There were no warning lights illuminated. The vehicle was taken to the dealer, who diagnosed that the connecting rod had failed, and there were metal shavings inside the engine. The contact was informed that the engine needed to be replaced. The contact related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the VIN was not included. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed that there was no recall on the VIN. The manufacturer opened a case for the failure. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 169,000.

  • Filed Aug 2025

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, there was an abnormal banging sound coming from the vehicle. There was no warning light illuminated. The contact inspected fluids but found no defects with the vehicle. The vehicle was then taken to an independent mechanic, where the mechanic discovered that the lifters and cam shaft were defective. Due to the failure, the engine was replaced. The contact stated that recently, the abnormal tapping sound returned. The vehicle was taken back to the independent mechanic, who confirmed that the failure with the lifters had returned. The vehicle was taken to a dealer who confirmed the lifter failure, and the contact was provided an estimate for the repair. The manufacturer was notified of the failure, and the contact was provided a case number. The contact was then referred to the NHTSA to report the failure. The vehicle was not yet repaired. The failure mileage was approximately 90,000.

  • Filed Jun 2025 · Also filed under Fuel System, Gasoline

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle failed to accelerate as intended. The message "Reduced Power" was displayed, and the RPMs increased. Additionally, the vehicle jerked, and the contact noticed that there was smoke coming out of the exhaust pipe. The vehicle was driven to the contact's residence. The vehicle was taken to an independent mechanic, where it was diagnosed that the starter, the battery, the fuel pump, the oil pump, the oil pump sensors, and the fuel injectors had failed and needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The contact stated that while driving at an undisclosed speed, the vehicle stalled. There was no warning light illuminated. The vehicle was able to restart; however, the failure recurred. The vehicle was driven to the contact's residence. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 133,742.

  • Filed Nov 2024

    The contact owns a 2018 GMC Sierra 1500. The contact stated that after starting the vehicle, there was an abnormal ticking sound coming from engine compartment. The vehicle was taken to the local dealer who diagnosed that the exhaust manifold bolts had fractured and needed to be replaced. The vehicle was not yet repaired. The manufacturer was not yet notified of the failure. The failure mileage was 64,000.

  • Showing the 5 most recent of 6.
• Vehicle Speed Control6

  • Filed Jun 2025 · Also filed under Power Train

    I am the original owner of a 2018 GMC Sierra 1500 with the 6.2L L86 engine and 8-speed 8L90 transmission. I began experiencing severe transmission shuddering and harsh shifting, especially at lower speeds or under light acceleration. When the issue occurs, I press the gas and the engine revs up to 6,000 RPM without reaching 20 MPH, making it extremely difficult — and dangerous — to merge into traffic or cross intersections. This issue has worsened over time and is now a critical safety concern, especially with children in the vehicle. I have researched this issue and found that many owners report the same transmission defect, and there is an open class action lawsuit and a GM Technical Service Bulletin (TSB #18-NA-355) describing the exact symptoms. The vehicle has become unsafe to drive. GMC should issue a recall or mandatory repair program for this known defect before someone is injured or killed.

  • Filed May 2024 · Also filed under Power Train, Engine

    2018 gmc Seirra 1500 8 speed transmission. Making unsafe conditions while driving transmission tends to make hard shifts, jerks, hesitation when moved into gear, gets worse when stopping momentarily at stop lights and then trying to accelerate vehicle will not move. Makes hard shift and jerks then will accelerate in an unsafe manner.

  • Filed Aug 2022 · Also filed under Engine, Fuel/Propulsion System

    THE SPEED OF THE TRUCK WILL NOT INCREASE. THE RPMS GOES REALLY HIGH AND THE TRUCK WILL NOT MOVE INTO THE NEXT GEAR. THE REAR END OF TRUCK VIBRATES. I TOOK THIS TO THE DEALER AND WAS TOLD IT IS THE TRANSMISSION FLUID IS FAULTY. THE CHECK ENGINE LIGHT DOES COME ON. I DID NOT HAVE THE NEW TRANSMISSION FLUID CHANGED BECAUSE DEALER SAID IS COST $300 FOR THE FLUID AND $100 FOR THE LABOR AND $168 FOR THE DIAGNOSTICS. SO I STILL HAVE THE SAME PROBLEM. ALSO TOLD YOU CAN NOT PURCHASE THIS TRANSMISSION FLUID NO WHERE BUT GMC.

  • Filed Nov 2021 · Also filed under Electrical System, Service Brakes

    The truck displayed warning lights for ABS, traction control, trailer brakes, and front park assist. Additionally speed control (cruise) did not function. This presented a safety issue. I took to dealer asap. They repaired by replacing left rear wheel speed sensor. Cost about $216. Appears to work correctly at this time.

  • Filed Aug 2021

    Vehicle suddenly went into Reduced Engine Power while driving in heavy traffic. Vehicle immediately began to slow down and although there was some throttle response it was difficult to maneuver through traffic to get to the side of the road. This event happened around the 31,000 mile mark. The Reduced Engine Power message came on, but I do not remember hearing an audible alert. Being a 40 year Automotive Technician for GM, I am familiar with pulling codes and replacing parts. I called the dealership to see if this was covered by warranty and was told no. After pulling the codes, I personally replaced the Throttle Body Sensor and the Accelerator Pedal Assembly, but the vehicle continued to go into Reduced Engine Power mode. I took the vehicle into the dealership and they diagnosed the cause as a corroded connector. The connector was replaced and the vehicle was returned to me. After a little over one month and less than 1,000 miles the vehicle is once again going into Reduced Engine Power mode. I can have my vehicle available for inspection if necessary.

  • Showing the 5 most recent of 6.
• Seat Belts5

  • Filed Aug 2026

    THE FRONT PASSENGER SIDE SEAT BELT RETRACTOR IS FAILING TO RETRACT. I HAD A PASSENGER IN THE VEHICLE AND AS WE CAME TO A STOP IN MY DRIVEWAY TO EXIT THE VEHICLE SHE UNHOOKED (RELEASED) THE SEATBELT AND IT WILL NOT RETRACT. THE SEATBELT IS NOW CURRENTLY EXTENDED OUT AND WILL NOT RETRACT BACK INTO THE RETRACTOR. I PURCHASED THE VEHICLE TODAY 08-05-2026, I CALLED THE DEALER I PURCHASED IT FROM AND THEY STATE THAT THERE IS NO RECALL ON THE VEHICLE WITH THIS ISSUE. I DID LOOK THE ISSUE UP ON GOOGLE AND INFACT IS STATES A PROBLEM WITH THE SEATBELT RETRACTOR FOR MY VEHICLE. I SENT THEM A SCREENSHOT OF THE CONFIRMATION FOUND AND THEY DECLINE TO ACKNOWLEDGE A REPAIR STATING THERE IS NO RECALL. I WAS ABLE TO MANUALLY FEED THE BELT BACK INTO THE RETRACTOR, IT WAS EXTREMELY DIFFICULT BUT I SAT IN THE SEAT TO DUPLICATE THE ISSUE AND IT WILL DUPLICATE. THE SEATBELT IS CURRENTLY EXTENDED AND WILL NOT RETRACT AUTOMATICALLY. THE SHOULDER STAP WILL NOT FIT SECURELY AROUND A PASSENGER AT THIS TIME. I HAVE HAD NO PRIOR USE OF THE VEHICLE UNTIL TODAY AS I PURCHASED IT FROM A REPUTABLE DEALER WHO STATES THEY DID A FULL INSPECTION OF IT PRIOR TO SELLING BUT APPARENTLY THIS ISSUE WAS NOT REPAIRED PRIOR TO SELLING IT.

  • Filed Mar 2023

    THE MIDDLE REAR SEATBELT FAILS TO LOCK WHEN RETRACTED, THEREFORE I CANNOT USE MY GRANDCHILD'S BOOSTER SEAT. THE DEALERSHIP HAS ORDERED A REPLACEMENT, BUT COST NEARLY $300. I BOUGHT THE VEHICLE NEW IN DECEMBER 2018, BUT HAVE NEVER HAD TO USE THE REAL SEATBELT UNTIL NOW. THEREFORE I DID NOT KNOW IT DID NOT WORK PROPERLY UNTIL NOW.

  • Filed Jan 2022

    The contact owns a 2018 GMC Sierra 1500. The contact stated that the seat belt straps for the rear driver’s and passenger’s side seats would no longer retract and were stuck between the seat cushions. The cause of the failure was not determined however, the local dealer informed the contact that the seat belt retractors were likely defective and would need to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 60,000.

  • Filed Jan 2022

    Driver's side seat belt receptacle does not hold. It is difficult to get seatbelt to latch properly. Sometimes it latches and releases later. Dealer confirmed seat belt receptacle needed to be replaced.

  • Filed Mar 2020

    THE BACK MIDDLE SEATBELT BROKE SHORTLY AFTER THE VEHICLE WAS PURCHASED NEW.

• Tires5

  • Filed Jul 2024

    Purchased the tires on 10-25-2021 and with only 16,000 miles on the 4 new tires; we have non-normal cracking on the side of the Thread. These tires are only 3 years old. P275/55r20 We are contacting the tire manufacturer and also the tire service center for help under the 60,000 mile warranty. Bridgestone Dueler A/T Revo 3. The tires should not be cracking for any reason and should not be cracking due to dry rot or stress on the tire. Used on a 2018 GMC 1500 Serria.

  • Filed Sep 2023

    In May 2022, I purchased four Cooper Discoverer A/T All-Season 117T 275/55/R20 tires from Walmart.com for my 2018 GMC Sierra 1500 SLT. In May 2023 my vehicle developed a vibration when driving at certain speeds, so I took it to a GMC dealer for a tire rotation and balance. The mechanic discovered that one of the tires had a large bubble on the inner sidewall. He considered it such a safety risk that he insisted on removing the tire and replacing it with the spare before he would let me drive home. The tire was replaced with another of the same kind and tread depth. Yesterday (September 28 2023) I felt that my truck was wandering and swaying. I made an appointment for it to be inspected on Monday, and planned not to drive it until then. Today I observed that the rear passenger tire appeared low. I was shocked to find a split in the inner sidewall approximately one third of the circumference of the tire. I also found a large bubble on the inner sidewall of the driver's side front tire. I am shaken that I could have had three different tires blow out potentially killing myself and other motorists. I will be retaining the tires for inspection, and photographs have been taken. The manufacturer has been contacted. It seems that other model tires have been recalled by Cooper for the same issue, but I have not found a recall for this specific tire.

  • Filed Nov 2022 · Also filed under Suspension, Power Train

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undetermined speed, the vehicle was shaking while shifting gears. The contact stated while shifting from four cylinders to eight cylinders, the rear-end was shaking violently. The hood latch warning light was illuminated. The vehicle was taken to the local dealer where it was diagnosed and determined that the tires needed to be replaced. The tires were replaced three times however, the failure persisted. The manufacturer was not contacted. The failure mileage was approximately 50,000.

  • Filed Jun 2021

    All four OEM Bridgestone Dueler A/T P285/45R22 M+S tires are showing premature cracking in sidewall near the bead/wheel. The cracks appear on the full circumference of the tire and vary in length from short to several inches. Depth of cracking is estimated to be 1/16" and growing. The tires, with date code 2318, were on the brand new truck when purchased from the dealership in Aug 2018. The vehicle currently has 16k miles. Both the dealership and local Tires Plus chain have confirmed the issue, but there is not a suitable remedy. Bridgestone will not warranty the tires and replacement under the GM "warranty" is the same price as new aftermarket tires. I believe this is a pending safety concern.

  • Filed Jul 2019

    TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500 EQUIPPED WITH GOODYEAR WRANGLER SR-A TIRES, SIZE: 265/60R2. WHILE DRIVING 75 MPH, THE CONTACT NOTICED THAT ALL THE TIRES HAD BUBBLES. THE VEHICLE WAS TAKEN TO COULTER BUICK GMC TEMPE (address removed) FOR DIAGNOSTIC TESTING WHERE IT WAS CONFIRMED THAT THE TREAD SEPARATED FROM THE TIRES, WHICH NEEDED TO BE REPLACED. THE TIRES WERE NOT REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND INFORMED THE CONTACT TO CALL GOODYEAR. THE MANUFACTURER PROVIDED CASE NUMBER: 1692419. THE APPROXIMATE VEHICLE FAILURE MILEAGE WAS 24,600. THE TIRE FAILURE MILEAGE WAS 932.

• Visibility4

  • Filed Dec 2025

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the air conditioning system became inoperable. There was no warning light illuminated. The contact stated that the air conditioning system failed to function properly. The vehicle was taken to an independent mechanic, where it was diagnosed, and determined that the air conditioning condenser had failed and needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was not available.

  • Filed Jan 2025

    The contact owns a 2018 GMC Sierra 1500. The contact stated while driving approximately 35 MPH with the rear window defroster activated, there was a burning rubber odor inside the cabin of the vehicle and there was smoke coming from the rear window area. While inspecting the rear window the contact discovered that the rear window connector cover had melted, and the wire connections were a burning amber color, but no flames were present. After disconnecting the electrical connections, approximately 30 seconds later the rear glass panel on the passenger side suddenly shattered. No injuries were reported. The contact’s young daughter was seated in the rear during the failure. The vehicle was taken to the local dealer, but the cause of the failure was not yet determined. The manufacturer was not notified of the failure. The failure mileage was 60,952.

  • Filed Apr 2024

    See attached document for complaint

  • Filed Jun 2020

    TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE AIR CONDITIONER WAS INOPERABLE, CAUSING VISIBILITY ISSUES WHILE DRIVING. DUE TO THE FAILURE, THE DEFROSTER/DEFOGGER SYSTEM WAS INOPERABLE. MCCONNELL AUTOMOTIVE (address removed) WAS INFORMED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VEHICLE WAS NOT SUBJECTED TO A RECALL. THE DEALER PROVIDED AN ESTIMATE OF $1,191 TO REPAIR THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE 50,724.

• Hydraulic4

  • Filed May 2025 · Also filed under Service Brakes

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while depressing the brake pedal, the brake pedal displayed more resistance than expected, causing the contact to have to apply more pressure while depressing the brake pedal. The contact stated that the braking distance was extended due to the failure. The vehicle was taken to the dealer who diagnosed that the brake vacuum pump had failed and needed to be replaced. The vehicle was not repaired. The contact became aware of NHTSA Campaign Number: 19V645000 (Service Brakes, Hydraulic); however, the VIN was not included. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 75,000.

  • Filed May 2025 · Also filed under Service Brakes

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, while depressing the brake pedal to slow down, the brake pedal lost pressure, and the vehicle experienced a reduction in braking power. The contact had to depress the brake pedal with additional force to properly slow the vehicle. There was no warning light illuminated; however, the message "Brake Assist" was displayed on the instrument panel. The local dealer was not contacted, and the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 135,000.

  • Filed Oct 2024 · Also filed under Service Brakes

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while her husband was inside the parked vehicle, the ABS warning light illuminated. The contact researched the failure and was made aware of NHTSA Campaign Number: 00V055000 (Service Brakes, Hydraulic); however, the VIN was not included. The vehicle was taken to a dealer where it was diagnosed that the ABS control module had experienced a failure; and the ABS control module needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 112,000.

  • Filed Feb 2022 · Also filed under Service Brakes

    The contact owns a 2018 GMC Sierra 1500. The contact stated while driving approximately 35 MPH, the assist brake warning light was illuminated and the contact had to depress the brake pedal to the floor to stop the vehicle. The contact took the vehicle to the local dealer, where it was diagnosed with needing the vacuum pump to be replaced. The vehicle was not repaired but was pending repairs. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 20V603000 (Service Brakes, Hydraulic). The manufacturer had not been informed of the failure. The failure mileage was approximately 37,000.

• Equipment3

  • Filed Jul 2025

    The embedded navigation system in my 2018 GMC Sierra is no longer supported. Paid map updates were available until 2023, when General Motors discontinued them without notice. This system was marketed as a core feature and provided offline GPS guidance independent of cell reception. I discovered the change while attempting to purchase an update and was told there are no remaining copies and that no further updates will ever be made. I was never notified. When I contacted support, I was transferred through six departments. One representative admitted that customers were supposed to be informed but were not. She stated they are trained to say “there’s nothing we can do” and acknowledged receiving hundreds of similar complaints. She also confirmed the final map update existed but was allowed to sell out. This puts safety at risk, particularly for drivers in rural areas, areas with poor cell service, or while towing. The system is not CarPlay-based and does not rely on mobile data. It was the only in-vehicle routing system many drivers depended on during travel, including emergencies. Its quiet discontinuation means drivers no longer have access to accurate, integrated navigation—reducing their ability to safely plan or adjust routes while on the road. The failure to maintain this system or provide reasonable access to the final update undermines long-term vehicle safety and owner trust. General Motors has not offered an inspection, recovery, or remedy.

  • Filed Jun 2022 · Also filed under Electrical System

    Informant system and instrument clust/panel starts to change with nothing be clicked. Starts to phantom change everything which is deters from paying attention to actual driving becoming a safety hazard. Dealership has tried to update the software and still does not work.

  • Filed Aug 2020

    TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE AIR CONDITIONER DID NOT COOL WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE KING CADILLAC DEALER, LOCATED AT: [address removed] WHERE IT WAS DIAGNOSED THAT THE CONDENSER NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 50,000.

• Exterior Lighting3

  • Filed May 2022

    The left rear tail light assembly is subject to direct wheel spray resulting in premature corrosion and failure of the lightbulb and wiring harness. Failure first occurred Within 18 months of ownership. I cleaned the contacts and packed the connection with dielectric grease. However after three years the bulb connection is now totally corroded and the circuit has failed requiring harness replacement. The problem is so widespread, replacement wiring harnesses for the left rear tail light assembly are out of stock and unavailable from GM parts. I am now using the vehicle without operating right rear turn signals. GM-trucks.com is an owners chat room with many entries about this problem. [XXX], BSME, P.E. SAE INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

  • Filed Mar 2019

    PASSENGER SIDE HEADLIGHT JIGGLES UP AND DOWN CONSTANTLY OVER EVERY SMALL BUMP. VERY DISTRACTING AND LEAVES MANY BLACK AREAS ON THE ROAD FROM LACK OF LIGHT. FIX THIS IMMEDIATELY!

  • Filed Feb 2019

    PASSENGERS SIDE LOW BEAM JIGGLES UP AND DOWN WHEN GOING OVER SMALL BUMPS. DEALER TELLS ME ITS A COMMON ISSUE WITH THE PROJECTOR STYLE HEADLIGHTS BUT CANNOT BE REPLACED UNDER WARRANTY UNTIL GM RECOGNIZES IT.

• Seats2

  • Filed Oct 2025 · Also filed under Power Train, Engine

    I purchased a 2018 GMC Sierra 1500 6.2 Denali new. I followed all service requirements including oil changes by GM dealerships. 2025 i noticed my truck power was decreasing. Than I started to hear knocking noses. I took it to a dealership for diagnosis but they couldn't identify anything. Finally it started to skip this is when a dealership diagnose it as being an issue with the active fuel management system. They said my lifters, camshaft, and various other parts was damaged and had to be replaced. Additionally, they said it was a recall on 6.2 engines with the same identical issue but my year wasn't included. The cost to repair approximately 10,000. I really need your attention to this matter! September 10, 2025 my truck placed me and others in danger when it lose engine power. Also my engine light was on for the first time.

  • Filed Aug 2019

    TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE DRIVER'S SEAT MADE POPPING NOISES AND MOVED FROM SIDE TO SIDE WHILE THE VEHICLE MADE TURNS. THE MANUFACTURER ISSUED AN UNKNOWN TECHNICAL SERVICE BULLETIN, BUT IT WAS NOT COVERED UNDER A WARRANTY. THE VEHICLE WAS TAKEN TO COLONIAL BUICK GMC (address removed), BUT THEY REFUSED TO INSPECT THE CONDITION OF THE SEAT. THE DEALER ALSO REFUSED TO NOTIFY THE MANUFACTURER. THE DEALER ACKNOWLEDGED THE SERVICE BULLETIN, BUT CLAIMED THAT THEY COULD NOT DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 28,000.

• Visibility/Wiper2

  • Filed Jan 2022

    When operating my truck two days ago, I smelled something burning. I then noticed a small plume of white smoke coming from the rear driver's side window area. I then noticed my rear defroster was on, which I shut of right of way. About 30 seconds later, I heard a loud pop and I noticed the rear driver's side portion of the window was shattered. I brought my truck to the dealership and they said they could not figure out what happened. I believe it is tied to a prior recall, but they said my truck was found not to have any issues at that time. I believe there is a direct correlation with the recall issued and what happened a couple of days ago.

  • Filed Sep 2018

    I AM 6'8 AND HAVE NOTICE A SERIOUS INCREASE IN THE BLIND SPOT BEHIND THE REAR VIEW MIRROR. ON APPROACHES TO INTERSECTION, VEHICLES ARE HIDDEN AND I HAVE HAD 3 BEAR MISS COLLISIONS IN THE THE SAME NUMBER OF MONTHS. THIS IS MY 3RD GMC SIERRA AND THE ISSUES APPEARS TO BE RELATED TO ELEVATED SEAT WHICH CAN NOT BE LOWERED TO A SAFE LEVEL.

• Fuel System1

  • Filed Jun 2025 · Also filed under Engine And Engine Cooling, Gasoline

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle failed to accelerate as intended. The message "Reduced Power" was displayed, and the RPMs increased. Additionally, the vehicle jerked, and the contact noticed that there was smoke coming out of the exhaust pipe. The vehicle was driven to the contact's residence. The vehicle was taken to an independent mechanic, where it was diagnosed that the starter, the battery, the fuel pump, the oil pump, the oil pump sensors, and the fuel injectors had failed and needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The contact stated that while driving at an undisclosed speed, the vehicle stalled. There was no warning light illuminated. The vehicle was able to restart; however, the failure recurred. The vehicle was driven to the contact's residence. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 133,742.

• Gasoline1

  • Filed Jun 2025 · Also filed under Engine And Engine Cooling, Fuel System

    The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed and depressing the accelerator pedal, the vehicle failed to accelerate as intended. The message "Reduced Power" was displayed, and the RPMs increased. Additionally, the vehicle jerked, and the contact noticed that there was smoke coming out of the exhaust pipe. The vehicle was driven to the contact's residence. The vehicle was taken to an independent mechanic, where it was diagnosed that the starter, the battery, the fuel pump, the oil pump, the oil pump sensors, and the fuel injectors had failed and needed to be replaced. The vehicle was repaired; however, the failure reoccurred. The contact stated that while driving at an undisclosed speed, the vehicle stalled. There was no warning light illuminated. The vehicle was able to restart; however, the failure recurred. The vehicle was driven to the contact's residence. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 133,742.

• Lane Departure1

  • Filed Dec 2021 · Also filed under Forward Collision Avoidance

    Driver Assist-Lane Keeping Assist-Forward Collision Warning-Automatic Emergency Breaking Life Threatening When System Fails and is Intermittent . Vehicle has been said to be dangerous to drive by GM Tech/Can cause life threatening conditions. Fault has been confirmed by Dealership. WARNING LAMP> "SERVICE DRIVER ASSIST SYSTEM" Friday 3 December 2021 at approximately 21340 miles.

• Electronic Stability Control (esc)1

  • Filed Jan 2018 · Also filed under Steering, Service Brakes

    WHEN DRIVING VEHICLE AT ANY SPEED IT STEERS TO THE LEFT OR RIGHT . NOT A SIMPLE ALIGNMENT PULL OR WANDER I CAN FEEL THE WHEEL AS TO WHICH WAY IT WANTS TO STEER AT RANDOM. IF NOT PAYING ATTENTION OR IF YOU WERE TO LET GO OF THE STEERING WHEEL IT WILL GO OFF THE ROAD ABSOLUTLY NOT SAFE TO DRIVE. WHILE ACCELERATING THE VEHICLE FEELS LIKE THE BRAKES ARE BEING APPLIED AND DOES NOT ACCELERATE I HAVE TO GIVE EXCESSIVE GAS PETAL THROTTLE TO GET UP TO SPEED. THERE HAVE BEEN TIMES I HAVE CAME HOME FROM AS SHORT DRIVE AND I CAN SMELL THE BRAKES THEY SMELL BURNT HOT. ONE INSTANCE I WAS MERGING ONTO THE HIGHWAY AND THE TRUCK STRUGGLED TO GET UP TO 60MPH I HAD THE PETAL FLOORED AND THE TRUCK WOULD NOT GO OVER 65MPH THE ENGINE WAS @ 5000RPM MAXED OUT IT WOULD NOT SHIFT NOR GO FASTER THAN 65MPH. RANDOMLY TRANSMISSION THUNKS THUD AND SLAMS INTO GEARS WHEN THE AUTOMATIC TRANSMISSION IS SHIFTING AT LOW SPEED BELOW 50. WHILE DRIVING TRUCK FEELS LIKE THE DRIVE TRAN IS BOUND UP LIKE BRAKE IS APPLIED ON INDIVIDUAL WHEEL(S) . I HAVE HAD NOTHING BUT PROBLEMS WITH THIS TRUCK VERY WEIRD ISSUES THAT DON'T MAKE MECHANICAL SENSE. ALSO THE INSTRUMENT CLUSTER GAUGES AND INFOTAINMENT SCREEN DON'T LIGHT UP JUST BLACK SCREENS AFTER STARTING VEHICLE. HAPPENED 2 TIMES NOW. RADIO WAS OFF WHILE DRIVING THEN CAME ON FULL VOLUME WITHOUT TOUCHING ANYTHING. SERVICE STABILITY /STEERING WARNING CAME ON ONCE.I CAN HEAR FRONT TRANSFER CASE ENGAGE AND DISENGAGE AT LOW SPEEDS RANDOMLY WHEN IN 2WD. RANDOMLY STUCK IN LOW GEAR WHEN ACCELERATING FROM A STOP. AND YOU DON'T HAVE TO USE THE BRAKES MUCH TO STOP YOU BECAUSE AS SOON AS YOU LET OFF GAS PETAL THE VEHICLE NEARLY COMES TO A STOP WITHOUT APPLYING BRAKES. AND IF YOU ARE TURNING IT WILL AT TIMES COME TO A COMPLETE STOP. HAS BEEN TO DEALER 6 TIMES NOW THEY SAY EVERYTHING CHECKS OUT. THERE IS A MAJOR COMPUTER ISSUE OR IS HACKED PER ALL IVE RESEARCHED.

Safety ratings

NHTSA 5-Star Safety Ratings from government crash tests. Ratings differ by cab style and 2WD/4WD, so check the row that matches the truck. Source: nhtsa.gov/ratings.