Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 GMC Envoy owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2003 GMC Envoy. The contact stated that while in drive(D), the vehicle shut off and then restarted. The message "Service Engine Soon" was displayed. The vehicle was taken to the local dealer, where it was diagnosed and determined that the instrument cluster needed to be replaced. The vehicle was repaired, but the failure reoccurred. The vehicle was taken back to the dealer who installed the original instrument cluster, but the failure persisted. The manufacturer was not notified of the failure. The approximate failure mileage was 98,000.
The contact owns a 2003 GMC Envoy. The contact stated that the headlights ceased to operate as needed. Upon taking the vehicle to a local Pep Boys, it was diagnosed that the electrical wiring harness was burned and needed to be replaced. Additionally, the bulbs needed to be replaced. The contact stated that the vehicle was repaired; however, the failure recurred. The vehicle was taken back the local Pep Boys, who replaced the electrical wiring harness and the bulbs a second time; however, the failure persisted. The dealer and the manufacturer were not notified of the failure. The vehicle was not repaired. The failure mileage was unknown.
The car's gas gauge and fuel range indicator are problematic. The fuel gauge quickly drops from a higher reading, like 3/4 full, to empty. After this, the gauge and the fuel range both fluctuate while driving, making it impossible to determine the fuel level.
I noticed a electrical burning smell while driving on a side street. The engine made an unusual noise so I pulled over, turned the car off and put on the hazard lights. While waiting for the tow truck, the car started with no key in the ignition. The car ran for a short time then stopped and attempted to restart itself about 5 times. Our mechanic took a look at it and said there had been a fire in the fuse box. I took pictures of the charred remains of the fuse box, cover and connectors. Most of the plastic connectors under the fuse box could not be removed because they had melted and were fused onto the box. He noted the fire seemed to originate from fuse 46, the headlamp driver module. For the past few years, I had been experiencing headlight and tail light issues involving bulbs that were burning out frequently or were going out then coming back on.
Driving in a school zone of 25 miles per hour and began to smell a rotten egg smell. The gauges on the dash remained normal. Pulled over at the next parking lot of a tractor supply and turned the car off. Smoke was coming from under the hood. Opened the hood and saw immediately where the smoke was coming from. We disconnected the battery first the positive, then the car started on its own, without a key in the ignition. Finally got the battery disconnected and the smoke continued. The result was a melted fuse box relay block a hole all the way through and a damaged electrical harness. The car is not drivable. It was towed. A claim was turned into geico and was denied by the insurance company. The repair estimate is somewhere between $1000-2500 to repair. I have noticed through research that this is not an uncommon problem with this vehicle. …
Drove to work Saturday night 12/07/2013 parked car at 7:30 pm went in to work .came out to my car at 10:00 pm for break to see my car smoking the passengers heated seat turned it's self on at some point and was on fire burning the seat and my cooler that was sitting on the seat was on fire and smoke filled the car was making it hard to breath the smoke was thick and smelled toxic. Me and my fellow employees dumped snow on and under the seat from as far,away as we could till the smoke calmed down.to get the fire out.I am so grateful I was not driving or there was no person sitting on the seat at the time could of caused me to wreck myself or others.on my drive home could not use the heat due to the fumes being to strong with the windows up and heat on had to drive with no heat and windows down 40 minutes with the temps in the teens.
The electric wiring for the windows and side mirrors will start making a clicking noise and when I put the key into the ignition and turn the key just one turn the front passenger window goes completely down and will not go back up until it is done clicking and turning the heated seats on and off. The regulator is not broke. Also the side mirrors even though they are programmed will sometimes just start moving and act like it cant move anymore and make a noise. The music and or radio will go out while its turned on, it will cut in and out and then after driving a while it wont cut in and out. For the window to just roll down it usually happens after it sat all night. Wont go back up for at least 2 minutes and you can see the door lights flicker and click.
Tl* the contact owns a 2003 GMC Envoy. The contact stated that the vehicle failed to start. In addition, the headlights failed to illuminate while driving at night. There were no warning indicators illuminated. The vehicle was not taken to a dealer or an independent mechanic for diagnostic testing or repairs. The manufacturer was not notified of the failures. The approximate failure mileage was 70,000.
The dash cluster does not work correctly, all the lights turn on and doors lock while I am driving on in town or on the highway , all the gauges come on at once while driving on the streets at random times.. The rear has airbags in the suspension and and aren't working properly, I took it to the shop and they said it had 30 codes on the diagnostic machine but they couldn't find the problem
Tl* the contact owns a 2003 GMC Envoy. While at a complete stop, the vehicle stalled without warning. After repeated attempts, the vehicle failed to restart. The vehicle was towed to the dealer where the cylinder ignition switch was replaced. The manufacturer was notified of the failure. The failure mileage was 36,429. Updated 06/14/16 updated 06/30/16.
Electrical complaints in other Envoy years
Frequently asked questions
How common are electrical problems on the 2003 GMC Envoy?
NHTSA has 77 complaints about the electrical system of the 2003 GMC Envoy, 20% of the model year's 394 complaints. The component named most often is instrument cluster/panel (15 mentions).
Is there a recall for 2003 GMC Envoy electrical problems?
No. NHTSA lists no electrical system recall for the 2003 GMC Envoy, though it has 7 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2003 GMC Envoy electrical problems start?
Half of the complaints with a recorded mileage happened before about 67,000 miles, and 15% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 5 fires and 0 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
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.