2015–2019 Chevy Silverado HD / GMC Sierra HD 6.6L Duramax diesel maintenance schedule
From the factory owner's manual. "Severe" is the schedule the manual gives for towing, plowing, heavy loads, lots of idling, dusty roads or extreme temperatures. Your truck's own manual and dash reminders come first.
The 2015 (LML) and 2018 (L5P) Duramax supplements give the same intervals for these items. Brake fluid is from the 2015 supplement; the 2018 supplement leaves it and other chassis items to the owner's manual.
| Item | Normal driving | Severe use |
|---|---|---|
| Oil and filter changeWhen the dash says to change it, and at least once a year. GM checks oil life at every 7,500-mile service. | Every 7,500 miles or 1 year | Every 7,500 miles or 1 year |
| Tire rotation and required services | Every 7,500 miles | Every 7,500 miles |
| Inspect steering, suspension and chassis partsPart of GM's required services at every 7,500 miles. | Every 7,500 miles or 1 year | Every 7,500 miles or 1 year |
| Replace fuel filterOr sooner when the dash shows CHANGE FUEL FILTER. More often when towing for long periods, off-road, in heavy dust or on biodiesel. | Every 22,500 miles or 2 years | Every 22,500 miles or 2 years |
| Drain and fill engine cooling system | Every 150,000 miles or 5 years | Every 150,000 miles or 5 years |
| Replace engine air filterInspect it at every oil change on dusty roads. | Every 45,000 miles or 4 years | Every 45,000 miles or 4 years |
| Change Allison transmission fluid and filter | Every 97,500 miles | Every 45,000 miles |
| Replace brake fluid | Every 150,000 miles or 10 years | Every 150,000 miles or 10 years |
What's due next?
Sources
Applies to
Chevrolet Silverado 2500HD: 2015 · 2016 · 2017 · 2018 · 2019
Chevrolet Silverado 3500HD: 2015 · 2016 · 2017 · 2018 · 2019