1999-present
The GMC Sierra is essentially a premium Silverado with a different grille and nicer interior trims. The Denali trim is the most luxurious American pickup truck. The AT4 is the off-road-focused trim.
Affects GMC Sierra 1500: 2014-2021
Affects GMC Sierra 1500: 2007-2020
Affects GMC Sierra 1500: 2015-2020
Affects GMC Sierra 1500: 2014-2018
Affects GMC Sierra 1500: 2019-2023
Same transmission fluid flush as Silverado.
Updated lifters and cam available for DFM-equipped engines.
| Service Item | Estimated Cost | Interval |
|---|---|---|
| Oil Change (Synthetic) | $70-$110 | Every 7,500 mi |
| Brake Pads (Front) | $175-$375 | Every 50,000 mi |
| Transmission Fluid | $200-$350 | Every 45,000 mi |
| Spark Plugs (V8) | $200-$350 | Every 60,000 mi |
| Transfer Case Fluid (4WD) | $100-$175 | Every 45,000 mi |
Costs are estimates and vary by location, shop, and vehicle condition. Dealership pricing may be higher.
GM's 4.3L V6 and early LS-series V8 engines rarely have head gasket issues. The Duramax diesel, however, can develop head gasket failures from high cylinder pressures — a $3,000-$6,000 repair.
$1,000 – $3,000
GM trucks and SUVs use hub assemblies that include the ABS sensor. Replacement is straightforward but costs $200-$400 per wheel.
$200 – $600 per wheel
GM V8 engines (LS/LT series) still use traditional spark plug wires. AC Delco or MSD wires are recommended.
$50 – $200 (set)
The Sierra Denali is the luxury truck to beat. For the best value, look at the SLT trim — it has most of the Denali features at a lower price. The 2019+ T1 generation is the best Sierra yet. The 6.2L V8 with the 10-speed is the top powertrain. Budget for the same AFM/DFM maintenance items as the Silverado.