Is the 2003 GMC Sierra a bad year?
206 owner complaints to NHTSA. Engine and transmission complaints are in line with other Sierra years.
Keep it
Engine and transmission complaints for the 2003 GMC Sierra are in line with other Sierra years. Brakes 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 2003 Sierra 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 79,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| BrakesSTANDS OUT | 83 (40%) | 46k–106k miles · around this mileage | Brake pad replacement (one axle) $115–$390 · Brake pads and rotors replacement (one axle) $200–$1,084 |
| Electrical system | 31 (15%) | 39k–93k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Engine | 12 (6%) | 5k–87k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Transmission and drivetrain | 29 (14%) | 3k–38k miles · mostly behind | — |
| Steering | 27 (13%) | 14k–48k miles · mostly behind | — |
| Body structure | 6 (3%) | 20k–58k miles · mostly behind | — |
| Speed control | 12 (6%) | too few with a mileage | — |
| Fuel system | 7 (3%) | too few with a mileage | — |
| Suspension | 6 (3%) | too few with a mileage | — |
| Air bags | 5 (2%) | too few with a mileage | — |
| Tires | 5 (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 79,000 miles. Not a quote.
What owners reported alongside their complaints
Of 206 complaints: 8 mention a crash · 1 mentions a fire · 4 report an injury.
No complaints in the last 12 months; the newest was filed in Dec 2015.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
Transmission: been fixed 3 times and finally replaced A/C: repaired once front end-steering: repaired 3 times and still not fixed.
Transmission has "Clunking" Noise when vehicle shifts from second to third gear when starting and down shifting when stopping.
While driving at any speed vehicle has a problem shifting into a gear. When the gear is changing there is a hard thump/a brief hesitation before the gear actually goes in to the proper position.
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 79,000 miles), not by content. Unverified.
Recalls for the 2003 GMC Sierra: 9
These headlamps fail to conform to the requirements of federal motor vehicle safety standard no. 108, "Lamps, reflective devices, and associated equipment." These lamps do not contain the required amber side reflectors. Decreased lighting visibility may result in a vehicle crash.
Certain cequent 90 degree 7-WAY right angle adaptors sold by distributors in tow packages for aftermarket sales to tow 5th wheel RV travel trailers. Due to incorrect wiring of the harness, the trailer lights may not operate properly. If the trailer lights are not working properly, a vehicle crash can occur.
On certain crew cab pickup trucks and sport utility vehicles, the 2nd row center occupant seat belt routing may make it difficult to position the lap portion of the safety belt low around the hips of occupants, especially smaller occupants, seated in this position. A lap portion of the seat belt routing that is not low and snug on the hips can allow the lap belt to ride up on an occupant's abdomen instead of fitting low around their hipbones, and therefore…
On certain pickup trucks equipped with manual transmissions and built with either pbr parking brake systems or trw parking brake systems, the parking brake friction linings may wear to an extent where the parking brake can become ineffective in immobilizing a parked vehicle. If the parking brake does not hold, unintended vehicle movement could occur, which could result in a crash.
Certain extended and regular cab pickup trucks and cargo vans converted to compressed natural gas (CNG) fail to conform to the requirements of federal motor vehicle safety standard no. 225, 'child restraint anchorage systems.' these vehicles have one seating position, the center rear seat… The standard requires child seat lower anchorages in two seating positions for vehicles with three rear seating positions.
Aftermarket pickup truck over-the-rail bedliners manufactured for installation on 1999-2004 Chevrolet silverado and GMC sierra pickup trucks. The toggle wing assembly used to attach the bedliner to the truck bed is not engaging fully in the stake pocket of the pickup truck. The bedliner can become detached from the pickup while it is motion, possibly endangering following motorists or pedestrians.
On certain pickup trucks and sport utility vehicles, the galvanized steel tailgate support cables that retain the tailgate in the full open (Horizontal) position may corrode, weaken, and eventually fracture. If both cables fractured, the tailgate would suddenly drop and strike the top surface of the rear bumper. Anyone sitting or standing on the horizontal surface of the tailgate when both cables fractured could be injured by falling from the tailgate. On vehicles that have had the bumper removed, the tailgate may drop even lower.
Certain sport utility vehicles, pickup trucks, and passenger vans fail to comply with the requirements of federal motor vehicle safety standard no. 135, - passenger car brake systems.? Some of these vehicles were produced with an out-of-specification brake hydro-boost housing relief valve bore. Consequently, the valve o-ring seal may fracture. Steering efforts may be slightly increased while braking or parking.
Certain pickup trucks fail to conform to federal motor vehicle safety standard no. 212, "Windshield mounting." Some of these vehicles lack a continuous urethane bonding bead between the body surface and the windshield. In vehicles with this condition, the windshield may not be retained in accordance with the safety standard during a vehicle crash.
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: 36
Repair instructions GMC sent its dealers for symptoms seen in the shop on the 2003 GMC Sierra. Ask a dealer or mechanic for a bulletin by its number.
Gmc/chevrolet: engines, with EGR system, has leakage from EGR cooler engine coolant into the combustion chamber
General motors: an optional engine block heater plug in for onboard ac power and with continuous usage will result in shorting of wires, over heating system…
Not engagement into drive, delayed, no engagement into reverse, and or a range inhibit
Service Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise
NHTSA defect investigations: 5
Brake line corrosion failure
Parking brake failure
Parking brake failure
Tailgate cable breakage
Parking brake failure
Neighbouring years
2002 Sierra: 249 complaints, keep it · 2004 Sierra: 188 complaints, keep it.
Every GMC Sierra year
2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014 · 2015 · 2016 · 2017 · All Sierra 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 1500 · 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 2003 GMC Sierra a bad year?
206 owner complaints to NHTSA. Engine and transmission complaints are in line with other Sierra years. At 79,000 miles the tool says: Keep it.
What are the most common problems with the 2003 GMC Sierra?
By owner complaints to NHTSA: brakes (83), electrical system (31), engine (12), transmission and drivetrain (29), steering (27).
How many recalls does the 2003 GMC Sierra have?
9 recall campaigns list this model year: Exterior lighting (NHTSA 09E025000), Equipment (NHTSA 07E066000), Seat belts (NHTSA 05V-163), Parking brake (NHTSA 05V-161) and more. 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.