2020 Chevrolet Silverado 3500HD

What owners should know

Covers 2020–2026 · 6.6L Duramax L5P diesel and 6.6L V8 gas · Updated 2026-10-01

Researched from owner forums and NHTSA complaints and written by Know Your Truck. These are patterns in what owners report, not a guarantee about any particular truck.

Common failures & how to fix them

Parts and video buttons search for your 2020 Chevrolet Silverado 3500HD. Always confirm a part fits using your VIN. Brakes, steering, fuel and airbag work affects your safety, so if you're not sure, have a qualified mechanic do it.

• 10-speed transmission valve body failure

  Dealer (recall)

  Signs: Sudden hard downshifts, limp mode, or rear wheel lock-up on diesels.

  Fix: Covered by GM recalls on 2020–2022 diesels. Other repairs are usually under warranty on newer trucks. Ask a dealer for all open recalls and bulletins.

  May be covered free by recall 24V797000 / 26V083000. Check the VIN at nhtsa.gov/recalls.

• Trailer brake controller warnings

  Easy DIY

  Signs: 'Check trailer wiring' or 'Trailer brakes disconnected' messages that cut the trailer brakes.

  Fix: Clean and inspect the 7-pin trailer connector and the trailer's wiring first. If it continues, have a dealer check for bulletins and module updates.

  Shop: 7 pin trailer connector▶ How-to videos

• Power tailgate opens unexpectedly

  Dealer (recall)

  Signs: The tailgate unlatches by itself, often after water gets in.

  Fix: Covered by GM recalls on 2020–2024 trucks with power-unlatching tailgates.

  May be covered free by recall 24V060000 / 24V894000. Check the VIN at nhtsa.gov/recalls.

• Steering gear shaft can break (2024)

  Dealer (recall)

  Signs: Loose steering or a clunk. In rare cases loss of steering.

  Fix: Covered by a GM recall on some 2024 trucks.

  May be covered free by recall 23V549000. Check the VIN at nhtsa.gov/recalls.

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.

• Power Train:Automatic Transmission:Control Module:Software

  Feb 2026 · #26V083000

  General Motors, LLC is recalling certain 2020 Chevrolet Silverado 2500, 3500, GMC Sierra 2500, 3500, and 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles that may have been repaired incorrectly under recall 24V797. The transmission control valve may fail and cause the rear wheels to lock up.

  Risk and fix

  Risk: Rear wheel lock up increases the risk of a crash.

  Fix: Dealers will inspect the vehicles and update the transmission control software, free of charge. Owner notification letters were mailed March 6, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252516560. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 12, 2026.

• Power Train:Automatic Transmission:Control Module:Software

  Oct 2024 · #24V797000

  General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Silverado 1500, 2500, 3500, GMC Sierra 1500, 2500, 3500, 2021 Cadillac Escalade, Escalade ESV, Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL vehicles equipped with diesel engines. The transmission control valve may fail and cause the rear wheels to lock-up.

  Risk and fix

  Risk: Rear wheel lock-up can increase the risk of a crash.

  Fix: Dealers will install new transmission control module software, free of charge. GM will provide a special coverage program to cover the repair of transmissions that are identified by the remedy software as containing a defective control valve. Owner notification letters were mailed December 12, 2024. Owners may contact GM customer service at 1-888-988-7267, Cadillac customer service at 1-800-458-8006, GMC customer service at GMC 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242454440.

• Latches/Locks/Linkages:Tailgate:Latch

  Feb 2024 · #24V060000

  General Motors, LLC (GM) is recalling certain 2020-2024 Chevrolet Silverado 2500, 3500, GMC Sierra 2500 and 3500 vehicles equipped with power-unlatching tailgates. The tailgate's electronic gate-release switch may short circuit due to water intrusion, which can result in the tailgate inadvertently unlatching while the vehicle is in park.

  Risk and fix

  Risk: An unlatched tailgate may open while driving and result in a loss of unsecured cargo, creating a road hazard and increasing the risk of a crash.

  Fix: Owners are advised to check that the tailgate is closed and latched before driving. Dealers will replace the exterior touchpad switch assemblies, free of charge. Owner notification letters were mailed May 17, 2024. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N232426400.

• Seat Belts

  Dec 2020 · #20V792000

  General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The seat belt brackets may not be secured to the seat frame in the front-row center seating position.

  Risk and fix

  Risk: If a seat-belt bracket is not secured, the seat belt may not properly restrain an occupant in the front-row center seat position, increasing the risk of injury in a crash.

  Fix: GM will notify owners, and dealers will inspect left-side and right-side front-row center seat-belt bracket attachments and reassemble it correctly as necessary, free of charge. The recall began January 26, 2021. Owners may contact GMC customer service at 1-800-462-8782, Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202314670.

• Air Bags:Side/Window:Curtain:Inflator

  Jul 2020 · #20V446000

  General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser component of the Roof-Rail Air Bag (RRAB) inflator may not have been properly crimped to the inflator and could separate from the inflator during air bag deployment.

  Risk and fix

  Risk: If the diffuser separates from the inflator during deployment, RRAB performance may be degraded, increasing the risk of injury in a crash.

  Fix: GM will notify owners, and dealers will replace the suspect RRAB modules, free of charge. The recall began September 3, 2020. Owners may contact Chevrolet customer service at 1-800-630-2438, Cadillac customer service at 1-800-333-4223, or Buick customer service at 1-800-521-7300. GM's number for this recall is N202305380.

• Structure:Body:Hood

  Jun 2020 · #20V324000

  General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles previously recalled under 20V-142. Some of the vehicles in 20V-324 were not part of Recall 20V-142 but received defect parts during another service (typically during collision repair). The hood-latch striker wires on replacement hoods installed for Safety Recall 20V-142 may not have been heat-treated properly, possibly causing them to fracture.

  Risk and fix

  Risk: If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.

  Fix: GM will notify owners, and dealers will replace the hood assembly, free of charge. For hoods sold over the counter, dealers will contact customers with instructions for hood replacement. The recall began July 7, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N202306490.

• Latches/Locks/Linkages:Hood:Latch

  Mar 2020 · #20V142000

  General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The hood-latch striker wires may not have been heat-treated properly, possibly causing them to fracture.

  Risk and fix

  Risk: If a striker wire fractures, the hood may open unexpectedly while driving, increasing the risk of a crash.

  Fix: GM will notify owners, and dealers will replace the hood assembly, free of charge. The recall began April 13, 2020. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192284960.

• Seat Belts:Pretensioner

  Nov 2019 · #19V814000

  General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. When the front seat belt pretensioners deploy, hot gas may vent through an opening in the pretensioner bracket, possibly igniting the carpet.

  Risk and fix

  Risk: A vehicle fire could result if materials ignite inside the vehicle.

  Fix: GM will notify owners, and dealers will close off the opening in the pretensioner bracket, free of charge. The recall began December 13, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192270600.

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 Train9

  1 involved a crash

  • Filed Jul 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that the check engine warning light was illuminated. Additionally, the vehicle later failed to start and became undrivable. The dealer was notified of the failure and an appointment was scheduled for diagnostic testing and for the manufacturer internal recall repairs. The vehicle was not diagnosed or repaired. Additionally, the contact became aware that the VIN was included in NHTSA Campaign Number: 24V797000 (Power Train); however, the local dealer was contacted and informed the contact that the dealer was not aware of the recall. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue via email, but no assistance was provided. The failure mileage was approximately 28,000. Parts distribution disconnect.

  • Filed Jul 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated while driving 65 MPH, the rear wheels locked-up. The contact was able to pull over to the side of the road. The contact resumed driving, but the vehicle was driving roughly, and the failure recurred while driving 30 MPH. The check engine warning light, the electronic stability control warning light, and other unknown warning lights were illuminated intermittently. The contact pulled into a gas station, where a mechanic inspected the vehicle, but the cause of the failure could not be determined. The vehicle was towed to the dealer, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired due to the cost. The contact related the failure to NHTSA Campaign Number: 24V797000 (Power Train); however, the VIN was not included in the recall. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was unknown.

  • Filed Apr 2025

    I recieved a recall notice from Chevrolet stating they needed to install a software update to the truck which will warn if a potential rear wheel lock up is about to occur due to faulty transmission valve body- which was stated that they do not have a fix for. After software update was installed- I was driving about 35 mile per hour on the trip home, and the truck abruptly downshifted very hard, momentarily locking up rear wheels, and the check engine light came on, and the vehicle message came up stating the vehicle was placed in a reduced propulsion mode(limp mode). The next day it did it again on my short drive to work of 2 miles. I took into dealership and they informed me that the valve body had failed- as mentioned in the recall notice. It is now 1 month later and I still do not have my truck back, the part is back ordered, and they have no idea when it will be fixed. I am without my primary form of transportation.

  • Filed Mar 2025

    The sudden rear wheel lock up recall that GM has released for the 2020+ Silverado's with the 10-speed transmission does not go far enough. The recall simply reprograms the PCM to alert the driver 10,000 miles prior to the valve in the valve body failing, puts the vehicle into limp mode, and extended the warranty on the valve body to 15 years or 150,000 miles. GM states there is no fix available and this is not correct. NextGen Drivetrain has developed a fix for this per their website [XXX] ). On their site they also provide videos of trucks experiencing the lock up where it seems that the vehicle downshifts to 2-nd gear at high speeds and creates a violent jolt. This is extremely troubling to me as these vehicles are meant to tow, and I am very fearful that this issue will happen while towing a long trailer while my family and I are traveling and putting them in danger of an accident. It is very concerning to me that NHTSA would allow for this type of a "FIX". I am not sure if you have seen the videos of this issue happening, or know that a fix does seem to have been developed. I ask that you please reopen this investigation and revisit the way GM is handling this recall, and look into the fix that NextGen drivetrain has developed. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

  • Filed Feb 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while driving on [XXX] at 70-73 MPH, the vehicle unexpectedly downshifted to first gear. The contact slammed on the brake pedal and pulled over to the side of the road. The vehicle was turned off. The contact stated that the tachometer had increased to over 3,000 RPM. The vehicle then red-lined. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the valve body control needed to be replaced but was on backorder for a month. The vehicle was repaired, but the vehicle failed to recognize the part. The dealer informed the contact that the transmission needed to be replaced. The vehicle was repaired, but the failure recurred. While driving, there was an abnormal knocking sound coming from the vehicle. The contact was able to pull over safely. The vehicle was towed to another local dealer, Spitzer Chevrolet Amherst (200 N Leavitt Rd, Amherst, OH 44001), where it was diagnosed and determined that the engine needed to be replaced. The contact was informed that the torque converter was wobbling, and the crankshaft bearings were shot. The vehicle was not repaired. The vehicle was towed to an independent mechanic who determined that the oil filter had metal shavings inside. They removed the oil pan and noticed the crankshaft had broken in half. The vehicle was not repaired. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 178,000. Parts distribution disconnect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

  • Showing the 5 most recent of 9.
• Service Brakes8

  • Filed Jan 2025

    During operation of the vehicle at approximately 45mph and sudden stopping/ breaking is required, truck fails to do so. It is a partial loss of brake pressure and a loud "whale cry" type sound that appears to be coming from under the hood. I have had it happen twice just recently; I have taken to dealer, and they cannot replicate the issue. I have caught the sound the second time on video. To summarize truck loses partial breaking power, pedal does not bottom out, but it feels like there is not as much pressure being applied to the breaks when needed. Once the sound stops all braking returns to normal.

  • Filed Dec 2024

    I haul vehicles for a living. My rear wheels locked up and my truck came to a complete stop while I was on the highway. Luckily I was able to pull over and no one was behind me. It has happened a total of 3 times. There is no fix for my recall yet. I’m terrified to drive, but this is how I make my living. What happens when it rains and my wheels lock up again. My life is on the line. I went to Chevrolet service they said they have no idea what could have caused this. Then a couple weeks later I get an open recall with no remedy. What am I suppose to do?

  • Filed Aug 2024

    We tow a 2024 Grand Design Solitude 310GK with our 2020 Chevy Silverado 3500 diesel truck. We are getting frequent but intermittent loss of our trailer brakes during towing. As you can imagine this is a serious safety issue. We will be towing and receive a message on the display "Trailer Brakes Disconnected" then typically followed by "Service Trailer Brakes". This has been happening more frequently over the past 3 months. Imagine driving down a hill with a 15K pound rv pushing you and there are NO brakes on the 5th wheel. It is extremely scary and dangerous. I've researched on the internet and Facebook and there seems to be a "Technical Bulletin" from GM Bulletin No.: 23-NA-149 Date: September, 2023 recommending the replacement of the Trailer Brake Control Module. I've called to have the dealer replace our brake control module but it is not covered because it is a "Bulletin" and not a "recall". This is absurd and the manufacturer should take care of this known issue.

  • Filed Apr 2024

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated while driving 10-15 MPH and approaching a stop sign, the brake pedal was depressed down to the floorboard, but the vehicle failed to respond. The contact made a left turn to avoid a ditch. The contact stated that the vehicle then rolled to a stop. The contact shifted to low gear, turned the hazard lights on, and was able to drive to the residence. Upon inspecting the vehicle, the contact noticed that the brake fluid was leaking. The vehicle was towed to the local dealer, where the passenger's side rear brake pads, brake disk, and brake calipers were replaced. The contact stated that the failure recurred while driving. The vehicle was towed to the dealer, where the driver's side rear brake pads, brake disk, and brake calipers were replaced; however, the failure persisted. The vehicle was towed to a second dealer, Duke Chevrolet GMC (2016 N Main St, Suffolk, VA 23434), where it was diagnosed that the passenger's side rear brake pads, brake disk, and brake calipers were severely damaged. Additionally, the failure had damaged the rim of the rear passenger's side inner tire. The vehicle was being repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 4,500. The VIN was not available.

  • Filed Apr 2024

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated while driving 10-15 MPH and approaching a stop sign, the brake pedal was depressed down to the floorboard, but the vehicle failed to respond. The contact made a left turn to avoid a ditch. The contact stated that the vehicle then rolled to a stop. The contact shifted to low gear, turned the hazard lights on, and was able to drive to the residence. Upon inspecting the vehicle, the contact noticed that the brake fluid was leaking. The vehicle was towed to the local dealer, where the passenger's side rear brake pads, brake disk, and brake calipers were replaced. The contact stated that the failure recurred while driving. The vehicle was towed to the dealer, where the driver's side rear brake pads, brake disk, and brake calipers were replaced; however, the failure persisted. The vehicle was towed to a second dealer, Duke Chevrolet GMC (2016 N Main St, Suffolk, VA 23434), where it was diagnosed that the passenger's side rear brake pads, brake disk, and brake calipers were severely damaged. Additionally, the failure had damaged the rim of the rear passenger's side inner tire. The vehicle was being repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 4,500. The VIN was not available.

  • Showing the 5 most recent of 8.
• Engine6

  • Filed Jul 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that the check engine warning light was illuminated. Additionally, the vehicle later failed to start and became undrivable. The dealer was notified of the failure and an appointment was scheduled for diagnostic testing and for the manufacturer internal recall repairs. The vehicle was not diagnosed or repaired. Additionally, the contact became aware that the VIN was included in NHTSA Campaign Number: 24V797000 (Power Train); however, the local dealer was contacted and informed the contact that the dealer was not aware of the recall. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue via email, but no assistance was provided. The failure mileage was approximately 28,000. Parts distribution disconnect.

  • Filed Feb 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while driving on [XXX] at 70-73 MPH, the vehicle unexpectedly downshifted to first gear. The contact slammed on the brake pedal and pulled over to the side of the road. The vehicle was turned off. The contact stated that the tachometer had increased to over 3,000 RPM. The vehicle then red-lined. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the valve body control needed to be replaced but was on backorder for a month. The vehicle was repaired, but the vehicle failed to recognize the part. The dealer informed the contact that the transmission needed to be replaced. The vehicle was repaired, but the failure recurred. While driving, there was an abnormal knocking sound coming from the vehicle. The contact was able to pull over safely. The vehicle was towed to another local dealer, Spitzer Chevrolet Amherst (200 N Leavitt Rd, Amherst, OH 44001), where it was diagnosed and determined that the engine needed to be replaced. The contact was informed that the torque converter was wobbling, and the crankshaft bearings were shot. The vehicle was not repaired. The vehicle was towed to an independent mechanic who determined that the oil filter had metal shavings inside. They removed the oil pan and noticed the crankshaft had broken in half. The vehicle was not repaired. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 178,000. Parts distribution disconnect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

  • Filed Dec 2024

    2nd time I’ve had to replace def heater and tank. Truck goes into limp mode and limits the speed leaving a person stranded.

  • Filed Sep 2023

    Fan pulley broke in half, snapped fan belt, damaged fan and caused truck to overheat. Truck would not turn off when overheated, even when fan was not working, so truck kept getting hotter. Dealer said this is the 3rd one they've seen this week

  • Filed May 2022

    GM recall N2123544170 DPF regeneration temperature /DEF heater for cold weather operation to keep def from freezing and also for thawing frozen def...dealer to replace def tank and internal heating element...dealer was unable to give a time line for replacement parts needed to fix truck.(parts are back ordered)So truck ECM=electonic control module.throws trouble code to reduce engine power that starts taking away engine power at 65 mph...then 55 mph... then 45... all the way down to 5 mph. This can happen at any time or anywhere that can result in possible accidents... ! GM needs to make this a priority as thousand of vehicles are affected!

  • Showing the 5 most recent of 6.
• Electrical System5

  1 involved a fire

  • Filed Jun 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while hauling a 2020 Heartland Cyclone, the trailer brakes unexpectedly deactivated. The contact stated that the trailer brake was disconnected, and the warning light to check the trailer winch was illuminated. The vehicle was taken to the dealer, who was unable to determine the cause of failure. The vehicle was not repaired, and the failure persisted. The vehicle was returned to the dealer and the contact was informed that the trailer brake module had failed and needed to be replaced. The trailer brake module was replaced. The failure and repair were linked to an unstated Technical Service Bulletin; however, the VIN was not included. The TSB stated that the RV battery was interfering with the vehicle battery and causing the failure. The contact stated that the failure persisted. The vehicle was returned to the dealer but was not diagnosed or repaired. The manufacturer was informed of the failure. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 52,000.

  • Filed Oct 2024

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while depressing the brake pedal, the tailgate brake light failed to illuminate. In addition, the contact stated that while a trailer was hitched to the vehicle, the message "Check Trailer Connection" was displayed, and other unknown warning lights were illuminated. The vehicle was taken to a local dealer where it was diagnosed; however, the failure was not identified. The vehicle was taken to another local dealer, Davis-Moore Chevrolet (8200 W Kellogg Dr, Wichita, KS 67209) for a second opinion. The vehicle was diagnosed; however, the cause of the failure was not identified. Upon further inspection, the contact related the failure to Technical Service Bulletin: 20-NA-198; however, the second local dealer advised the contact that the fix might not repair the vehicle. The contact stated that the failure had progressed over time. The manufacturer was made aware of the failure. The failure mileage was approximately 26,000.

  • Filed Jul 2023

    The blower motor for the HVAC system caught fire.

  • Filed May 2023

    I purchased a certified pre-owned 2020 Chevy Silverado 3500HD (6.6 Gas) November 2021. Within the next few weeks, I noticed brake squeaking that kept getting worse and the truck braking system would not stop like the 2500 I had traded in when I purchased the 3500HD. I had to adjust the trailer brake gain control up to as high as 9 or 9.5, should not have to adjust that high. I had trouble stopping at intersections and quick /emergency braking situations while pulling our trailer. This tells me the truck braking system is not working properly. Prior to leaving on a trip, I was having squeaking noise from the brakes that got louder and louder and more frequent. The dealer (Champion Chevrolet) checked the truck and brakes and told me it had the wrong brake pads and had replaced them. The first time I pulled off the interstate on my trip to Florida, the brakes began to squeak as they did before. This happened during the entire trip. Over the next few weeks after returning from my trip I had a couple of close calls trying to stop at traffic signals. My breaks would not stop me and I went into the intersection barely missing other vehicles. I am almost to the point of parking the truck until the dealer can make repairs that will fix the issues, but we use the truck to pull a trailer that is a major part on our income. I’ve had the truck back to the dealership I purchased the truck from and they keep saying it is a brake pad issue. They have changed the pads twice so far (I think), and within days the squeaking and noise starts again. Periodically I keep getting a message (service trailer brake system) on my dash display that is difficult to get the warning to stop displaying. The trailer brakes had been checked several times and I have hooked other trucks to the trailer and it works fine. So, the issue is with my truck and the braking system. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

  • Filed May 2022

    GM recall N2123544170 DPF regeneration temperature /DEF heater for cold weather operation to keep def from freezing and also for thawing frozen def...dealer to replace def tank and internal heating element...dealer was unable to give a time line for replacement parts needed to fix truck.(parts are back ordered)So truck ECM=electonic control module.throws trouble code to reduce engine power that starts taking away engine power at 65 mph...then 55 mph... then 45... all the way down to 5 mph. This can happen at any time or anywhere that can result in possible accidents... ! GM needs to make this a priority as thousand of vehicles are affected!

• Fuel/Propulsion System3

  • Filed Jan 2025

    Received a code P10D9. Infotainment center says 157 miles until 65 mph max speed. Dealer has no idea what’s wrong

  • Filed Dec 2024

    2nd time I’ve had to replace def heater and tank. Truck goes into limp mode and limits the speed leaving a person stranded.

  • Filed May 2022

    GM recall N2123544170 DPF regeneration temperature /DEF heater for cold weather operation to keep def from freezing and also for thawing frozen def...dealer to replace def tank and internal heating element...dealer was unable to give a time line for replacement parts needed to fix truck.(parts are back ordered)So truck ECM=electonic control module.throws trouble code to reduce engine power that starts taking away engine power at 65 mph...then 55 mph... then 45... all the way down to 5 mph. This can happen at any time or anywhere that can result in possible accidents... ! GM needs to make this a priority as thousand of vehicles are affected!

• Engine And Engine Cooling2

  • Filed Feb 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while driving on [XXX] at 70-73 MPH, the vehicle unexpectedly downshifted to first gear. The contact slammed on the brake pedal and pulled over to the side of the road. The vehicle was turned off. The contact stated that the tachometer had increased to over 3,000 RPM. The vehicle then red-lined. There were no warning lights illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the valve body control needed to be replaced but was on backorder for a month. The vehicle was repaired, but the vehicle failed to recognize the part. The dealer informed the contact that the transmission needed to be replaced. The vehicle was repaired, but the failure recurred. While driving, there was an abnormal knocking sound coming from the vehicle. The contact was able to pull over safely. The vehicle was towed to another local dealer, Spitzer Chevrolet Amherst (200 N Leavitt Rd, Amherst, OH 44001), where it was diagnosed and determined that the engine needed to be replaced. The contact was informed that the torque converter was wobbling, and the crankshaft bearings were shot. The vehicle was not repaired. The vehicle was towed to an independent mechanic who determined that the oil filter had metal shavings inside. They removed the oil pan and noticed the crankshaft had broken in half. The vehicle was not repaired. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The failure mileage was approximately 178,000. Parts distribution disconnect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

  • Filed Aug 2023

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that after driving at an undisclosed speed and towing a fifth wheel, after visual inspection, the contact observed that due to the routing of exhaust system, heat from the exhaust had started to melt the front wall of the trailer. The contact was concerned that the trailer battery and propane tank were resting on the other side wall, which could potentially cause a fire. The vehicle was not taken to the dealer or an independent mechanic. The manufacturer was notified of the failure but advised the contact that the exhaust could not be rerouted. The failure mileage was 40,000.

• Latches/Locks/Linkages1

  • Filed Jan 2025

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that upon commencing to drive at various speeds, the tailgate would open without user intention, and remain open despite attempting to shut close via the interior controls. The local dealer was contacted and confirmed the VIN was not included in the NHTSA Campaign Number: 24V060000 (LATCHES/LOCKS/LINKAGES). The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 65,000.

• Hydraulic1

  • Filed Apr 2024

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated while driving 10-15 MPH and approaching a stop sign, the brake pedal was depressed down to the floorboard, but the vehicle failed to respond. The contact made a left turn to avoid a ditch. The contact stated that the vehicle then rolled to a stop. The contact shifted to low gear, turned the hazard lights on, and was able to drive to the residence. Upon inspecting the vehicle, the contact noticed that the brake fluid was leaking. The vehicle was towed to the local dealer, where the passenger's side rear brake pads, brake disk, and brake calipers were replaced. The contact stated that the failure recurred while driving. The vehicle was towed to the dealer, where the driver's side rear brake pads, brake disk, and brake calipers were replaced; however, the failure persisted. The vehicle was towed to a second dealer, Duke Chevrolet GMC (2016 N Main St, Suffolk, VA 23434), where it was diagnosed that the passenger's side rear brake pads, brake disk, and brake calipers were severely damaged. Additionally, the failure had damaged the rim of the rear passenger's side inner tire. The vehicle was being repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 4,500. The VIN was not available.

• Unknown or Other1

  • Filed Feb 2024

    Back window or back cab cover seal is defective and caused water to leak in the cab and soak the carpet in the entire floorboard there are water stains on the headliner mold growing under back storage compartment. There are numerous other reports of this issue on different internet forums. I have the truck at the shop with gm saying they will cover 25% of the costs. I feel this to be a manufacturer defect. This isn't caused by normal wear and tear.

• Forward Collision Avoidance1

  • Filed May 2023

    I purchased a certified pre-owned 2020 Chevy Silverado 3500HD (6.6 Gas) November 2021. Within the next few weeks, I noticed brake squeaking that kept getting worse and the truck braking system would not stop like the 2500 I had traded in when I purchased the 3500HD. I had to adjust the trailer brake gain control up to as high as 9 or 9.5, should not have to adjust that high. I had trouble stopping at intersections and quick /emergency braking situations while pulling our trailer. This tells me the truck braking system is not working properly. Prior to leaving on a trip, I was having squeaking noise from the brakes that got louder and louder and more frequent. The dealer (Champion Chevrolet) checked the truck and brakes and told me it had the wrong brake pads and had replaced them. The first time I pulled off the interstate on my trip to Florida, the brakes began to squeak as they did before. This happened during the entire trip. Over the next few weeks after returning from my trip I had a couple of close calls trying to stop at traffic signals. My breaks would not stop me and I went into the intersection barely missing other vehicles. I am almost to the point of parking the truck until the dealer can make repairs that will fix the issues, but we use the truck to pull a trailer that is a major part on our income. I’ve had the truck back to the dealership I purchased the truck from and they keep saying it is a brake pad issue. They have changed the pads twice so far (I think), and within days the squeaking and noise starts again. Periodically I keep getting a message (service trailer brake system) on my dash display that is difficult to get the warning to stop displaying. The trailer brakes had been checked several times and I have hooked other trucks to the trailer and it works fine. So, the issue is with my truck and the braking system. [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

• Tires1

  • Filed Aug 2022

    The driver-side rear tire (P275/65R20) tread became separated while driving on I95 North with a fifthwheel. The tread became separated from the tire and caused sever damage to the trucks driver side rear wheel well and potential of losing control of the vehicle while towing a fifth wheel with my family of 5. The tire had to be replaced in another state so we could travel home and was not kept. There are pictures of the tire. There was no warning of this tire defect before it occurred.

• Fuel System1

  • Filed Mar 2022

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while driving at various speeds, the vehicle would independently downshift as the vehicle would fail to accelerate upon the depression of the accelerator pedal. The DEF (Diesel Exhaust Fluid) malfunction warning light would illuminate on the instrument panel during the failure. The contact had taken the vehicle to a dealer where they acknowledged the failure but informed him that the parts to repair the vehicle was unavailable. The manufacturer was notified of the failure and a complaint was filed. The vehicle had yet to be repaired. The failure mileage was approximately 40,000.

• Diesel1

  • Filed Mar 2022

    The contact owns a 2020 Chevrolet Silverado 3500. The contact stated that while driving at various speeds, the vehicle would independently downshift as the vehicle would fail to accelerate upon the depression of the accelerator pedal. The DEF (Diesel Exhaust Fluid) malfunction warning light would illuminate on the instrument panel during the failure. The contact had taken the vehicle to a dealer where they acknowledged the failure but informed him that the parts to repair the vehicle was unavailable. The manufacturer was notified of the failure and a complaint was filed. The vehicle had yet to be repaired. The failure mileage was approximately 40,000.

Safety ratings

NHTSA 5-Star Safety Ratings from government crash tests. Ratings can differ by cab style and 2WD/4WD.

NHTSA hasn't published star ratings for this truck. Many heavy-duty pickups aren't included in NHTSA's crash-test program, so this doesn't mean the truck is unsafe.