Is the 2008 GMC Sierra 1500 a bad year?
381 owner complaints to NHTSA. Engine and transmission complaints are in line with other Sierra 1500 years.
Keep it
Engine and transmission complaints for the 2008 GMC Sierra 1500 are in line with other Sierra 1500 years. Air bags stands out for this year: see below.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2008 Sierra 1500 owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 86,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| Air bagsSTANDS OUT | 243 (64%) | 48k–125k miles · around this mileage | — |
| Electrical system | 31 (8%) | 40k–131k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Body structure | 25 (7%) | 37k–118k miles · around this mileage | — |
| Engine | 19 (5%) | 56k–129k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Brakes | 10 (3%) | 23k–93k miles · around this mileage | Brake pad replacement (one axle) $115–$390 · Brake pads and rotors replacement (one axle) $200–$1,084 |
| Fuel system | 5 (1%) | 29k–113k miles · around this mileage | Fuel pump replacement $220–$1,500 · Fuel injector replacement (one injector) $300–$1,200 |
| Latches and locks | 23 (6%) | 30k–65k miles · mostly behind | — |
| Seat belts | 13 (3%) | too few with a mileage | — |
| Tires | 7 (2%) | too few with a mileage | — |
| Transmission and drivetrain | 6 (2%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 86,000 miles. Not a quote.
What owners reported alongside their complaints
Of 381 complaints: 12 mention a crash · 5 mention a fire · 13 report an injury · 13 say the car was towed.
4 complaints were filed in the last 12 months, the newest in Aug 2026.
Counts of what owners wrote in their complaints, not verified by anyone.
Recalls for the 2008 GMC Sierra 1500: 2
These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling. An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.
These vehicles are equipped with non-desiccated passenger frontal inflators containing phase-stabilized ammonium nitrate (PSAN) propellant. These inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, high temperatures, and high temperature cycling. An inflator explosion may result in sharp metal fragments striking the driver or other occupants, resulting in serious injury or death.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from GMC: 305
Repair instructions GMC sent its dealers for symptoms seen in the shop on the 2008 GMC Sierra 1500. Ask a dealer or mechanic for a bulletin by its number.
Measure for oil consumption and possible reasons for loss of oil
Some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak
Rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up
Guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system
NHTSA defect investigations: 3
Desiccated Air Bag Inflator Rupture
Non-crash engine compartment fires
Non-crash engine compartment fires
Neighbouring years
2007 Sierra 1500: 263 complaints, keep it · 2009 Sierra 1500: 234 complaints, keep it.
Every GMC Sierra 1500 year
2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014 · 2015 · 2016 · 2017 · 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026 · All Sierra 1500 years side by side
Other GMC models: GMC Acadia · GMC Canyon · GMC Denali · GMC Envoy · GMC Envoy XL · GMC Envoy Xuv · GMC Jimmy · GMC Safari · GMC Savana · GMC Sierra · GMC Sierra 2500 · GMC Sierra 3500 · GMC Sierra Denali · GMC Sonoma · GMC Terrain · GMC Yukon · GMC Yukon Denali · GMC Yukon Denali XL · GMC Yukon XL · GMC Yukon XL 1500. All makes and models.
Questions
Is the 2008 GMC Sierra 1500 a bad year?
381 owner complaints to NHTSA. Engine and transmission complaints are in line with other Sierra 1500 years. At 86,000 miles the tool says: Keep it.
What are the most common problems with the 2008 GMC Sierra 1500?
By owner complaints to NHTSA: air bags (243), electrical system (31), body structure (25), engine (19), brakes (10).
How many recalls does the 2008 GMC Sierra 1500 have?
2 recall campaigns list this model year: Air bags (NHTSA 21V-052), Air bags (NHTSA 21V-050). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.