Most common 2003 GMC Sierra 1500 problems
Share of the 180 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
GMC Sierra 1500 complaints by model year
Best Sierra 1500 years: 2012, 2013. Years to avoid: 2024, 2023, 2022, 2021, 2019. Compare all years →
2003 GMC Sierra 1500 recalls (1)
Equipment adaptive/mobility
On certain vans equipped with sure-lok wheelchair securement systems, the sprocket teeth of the retractor assembly is out of alignment.
Remedy: Dealers will inspect and replace the wheelchair securement retractors as necessary. Sure-lok will handle the repairs for this campaign.
What 2003 GMC Sierra 1500 owners say
Brakes all 105 →
While driving approximately 35 MPH in town, the vehicle in front of me signaled to make a left hand turn. I began to slow down the vehicle and then I lost all brake pressure. I was unable to stop the truck to avoid an accident due to complete brake failure! There were no previous lights or warning signals notifying of a brake problem prior to this. The warning light came on after the accident. The brake fluid reservoir was full. After further investigation, it appears that the brake lines were corroded causing the brake failure.
Tl* the contact owns a 2003 GMC Sierra 1500. While parked, driver of the vehicle depressed the brake pedal and placed the gear in drive; however, the brake pedal dropped to the floor board. The vehicle crashed into the driver's home. The contact did not mention of there were any injuries. The vehicle was towed to a collision repair shop. The mechanic stated the brake lines were severally corroded and would have to be replaced. There was an investigation under NHTSA action number:pe10010 (service brakes, hydraulic service brakes, hydraulic:power assist:hydraulic:hoses, lines/piping, and fittings) that May be related to the failure. The vehicle was not repaired. The approximate failure mileage was 89,093 updated 1/20/12 the consumer stated the vehicle was parked in the driveway. It was parked towards the top of the driveway. …
Electrical system all 43 →
An accident has not occurred yet, but it something I'm concerned deeply about. Awhile back there was a recall on the instrument cluster of the gmc Sierra 1500 (possibly othets on the list, im sure). I did wind up having the cluster replaced, there didn't seem to be any issues at the time. Now...the replacement cluster has gone haywire. I notice no issues with operations at this time. But the cluster doesn't register certain things or it fluctuates on and off, or doesn't read correctly at all. Is it possible that the replacement could have been bad as well?
While going down the road my speedometer was showing 120mph and I was only running 75mph. When I stop and shut off my vehical the speedometer reads 45mph instead of 0mph. If you switch the ignistion off and on several times it will eventually go back to 0mph. I was doing some research on it and found this web site www.topix.net. I found out pretty quick this is nothing new. There were so many listings on there for the same problem that it was unrealistic. I have always owned Chrysler products unitll I purchased my GMC. I have done nothing but bragg about howw I don't never have problems with this truck but now seeing all of these complaints for the same thing I kinda feel like an idiot. This is a very big safety issue exspecially when traveling the interstates. This could cause some prety serious wrecks when your showing your running 100mph and only doing 60mph. …
Steering
I have a 2003 GMC Sierra 1500. When turning at low speed at times the power steering goes out for a few seconds then comes back. Yesterday I almost hit a car head on due to this problem. I was turning into a gas station and the steering went out. A car was pulling out of the station as I was pulling in and the power steering went out. I was going straight at and I struggled through it to make the truck turn. If my wife would have been driving the truck, there would have been an accident. This needs to be recalled and fixed before someone gets killed. This has been going on for the last 6 months but yesterday was a close call.
Starting at <5K miles the vehicle power train clunked when shifting from 2nd to 3rd gear. Now at 70K miles it clunks when shifting between all gears except final drive. The dealership replaced the output shaft on the tranny, then the u-joints, and modified the electrical shift patern. It still clunks. Power steering intermittently locks up at slow speed turns, especially when braking. Light bulbs burn out almost every three months. Had to pay ($486.00) for replacing the intake manifold gasket when vehicle had little over 40K miles. Brakes fade and the pedal almost goes to the floor, again intermittent. I have almost caused several accidents due to the steering and brake issues. GMC issued a letter stating "this is a normal occurance and will not cause damage." well, it's getting worse in sound and clunking harder during shifting.
2003 GMC Sierra 1500 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.3L 6-cyl | 4-speed automatic | RWD | 14 / 19 / 16 |
| 4.3L 6-cyl | 5-speed manual | RWD | 14 / 19 / 16 |
| 4.8L 8-cyl | 5-speed manual | RWD | 14 / 19 / 16 |
| 4.8L 8-cyl | 4-speed automatic | RWD | 14 / 18 / 15 |
| 5.3L 8-cyl | 4-speed automatic | RWD | 13 / 17 / 15 |
| 4.3L 6-cyl | 4-speed automatic | 4WD/AWD | 13 / 17 / 15 |
| 4.3L 6-cyl | 5-speed manual | 4WD/AWD | 13 / 17 / 14 |
| 4.8L 8-cyl | 4-speed automatic | 4WD/AWD | 13 / 16 / 14 |
| 4.8L 8-cyl | 5-speed manual | 4WD/AWD | 13 / 16 / 14 |
| 5.3L 8-cyl | 4-speed automatic | 4WD/AWD | 13 / 16 / 14 |
EPA ratings. Class: Full-size pickup.
Frequently asked questions
Is the 2003 GMC Sierra 1500 a good car?
Based on 180 owner complaints filed with NHTSA, the 2003 Sierra 1500 rates average: about as many complaints as a typical year of the Sierra 1500 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2003 GMC Sierra 1500?
The brakes — 105 complaints, 58% of all complaints for this model year, most often about antilock/traction control/electronic limited slip. Next are the electrical system (43) and steering (15).
How many recalls does the 2003 GMC Sierra 1500 have?
There is 1 recall for the 2003 GMC Sierra 1500, the most recent from November 26, 2004 (equipment adaptive/mobility). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the GMC Sierra 1500?
The best years by complaints, compared at the same age, are 2012 and 2013. Years to avoid or approach with caution: 2024, 2023, 2022, 2021 and 2019. See the full GMC Sierra 1500 years comparison.
At what mileage do 2003 GMC Sierra 1500 problems happen?
The median mileage reported in complaints is about 75,000 miles; 22% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.