Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 GMC Envoy XL owners, lightly cleaned up (personal details are redacted by NHTSA).
My dad was driving his 2003 GMC Envoy XL home from work and he felt a small explosion and saw black smoke out of his rear view mirror. So he pulled over, got out, and there were flames underneath the car. Within 5-10 minutes the car exploded. A fire fighter and state trooper pulled over to help him, and they both said the fire looked like it started from a fuel leak because the flames were "dripping" under the car. After researching recalls and complaints, I am infuriated that there were so many complaints filed over this problem, and even an investigation was done, but it was not considered serious enough to be a recall. I can't even think about what would have happened if he had waited to pull over at the next exit or the first explosion had been bigger. Apparently, this is a problem with almost all years of this model since 2002. …
The fuel inlet seal on the top of the fuel tank had separated causing a smell of fuel and allowing matter to enter the fuel tank from the top...possibly causing the premature failing of the fuel pump. We understand GMC has extended the warranty on the vehicle for this issue to 150,000 miles. Our vehicle had over 155,000 miles when the problem occured but we never received notification from GMC of the extended warranty. Had we received this notification we would have taken in the vehicle for an immediate repair. The fuel pump failed and we had to purchase a new fuel tank (as a result of the faulty top seal) and fuel pump...costing us almost $1,700. We have a copy of the repair bill but I am unable to scan and upload it here at this time... I am in the military and will be moving to Korea in April, 2016
Tl* the contact owns a 2003 GMC Envoy XL. The contact noticed a strong fuel odor inside the vehicle. The contact took the vehicle to manfredi Chevrolet (2519 hylan blvd, staten island, ny 10306, [phone]) per an unknown recall regarding the fuel tank. The contact was informed that the failure was not related to the recall. The contact then took the vehicle to an independent mechanic where it was diagnosed that the fuel tank was leaking and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 110,000.
When in park position heavy gas fumes coming from a leak at the top of the tank. You can visually see the gas stains on the sides and bottom of tank.when rolling to a stop the fumes return.I'm getting headaches and burning of my eyes and throat.I checked my VIN for recalls, the parts involved are #14423c fuel tank inlet check valve fracture,and #07076a fuel tank modular reservoir assembly corrosion #12166 fuel filler neck..I'm afraid every time I drive it that I could be bodily harmed at any given moment, a spark,someone flicking a cigarette,a accident, anything that would trigger a spark.
My car will shut off when I am either turning or slowing down without any warning, I put the car in neutral, turn the key off then on again and it starts like nothing happened. The engine doesn't show any warning lights it just shuts off. This has happened now about 6 times. I don't have the money to take it to the dealer, but if I am given an idea of what to look for I can take it to my mechanic who is very qualified and did replace a sensor that went bad. Please help
Tl* the contact owns a 2003 GMC Envoy XL. The contact stated that the filler pipe was fractured and caused the bladder to leak. The contact took the vehicle to a certified mechanic who diagnosed that the bladder and filler neck needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 90,000.
Tl* the contact owns a 2003 GMC Envoy XL. While driving 30 MPH, the fuel gauge fluctuated and failed to properly display the amount of fuel in the tank. The lack of fuel caused the vehicle to stall. The vehicle was taken to a dealer, but was not diagnosed or repaired. The manufacturer was not made aware of the issue. The approximate failure mileage was 98,000.
Tl* the contact owns a 2003 GMC Envoy XL. While the vehicle was stationary, the engine warning indicator remained illuminated. It was diagnosed that the fuel tank fractured. The vehicle was repaired. The manufacturer was made aware of the failure. The failure mileage was 155,000.
(2003 GMC Envoy XL) I have recently found that my wife and kids have been riding around in a vehicle that was an explosion waiting to happen. General motors has extended their warranty on fuel tank issues 3 times because of a flawed design. I had no knowledge of this before purchasing, as I believe I am the second owner of this vehicle. I have since seen that this issue has been brought to your attention but not to the magnitude to which it is occurring. I wonder if someone has to die a fiery death before this issue is addressed seriously ? I have compiled many accounts of customers complaining of this issue and have records to share. I have contacted GM customer support, only to be put on hold for a total of 153 minutes in the realm of 4 calls with no resolution. This engineering failure consist of great numbers still on the road. …
I had been driving and pulled into a fast food restaurant and when I got out of my vehicle I noticed the smell of gasoline being close to a gas station I thought nothing of it when getting back in my vehicle after retrieving my food I now smelled the gasoline inside my vehicle still thought nothing that maybe the fumes were just lingering until the next day when the smell was stronger so strong that my child with asthma immediately had to get out of the vehicle so being cautious as anyone I had my husband take a look he smelled the gasoline but couldn't find a leak so he took it to our local mechanic who then diagnosed the problem and removed the tank and replaced it with a used tank and whatever part was needed to fix the issue so since then I have not smelled anymore gasoline but my check engine light refuses to go off not to mention I receive a letter in the mail stating that there …
NHTSA investigations
Fuel tank leak
In June 2007, GM will expand its special policy to address fuel tank inlet check valve (icv) fractures on certain model year (my) trailblazer ext and GMC envoy xl vehicles.the expanded policy covers my 2002-2004 trailblazer ext, GMC envoy xl, and GMC envoy xuv vehicles and will extend for a period of 10 years or 150,000 miles (whichever comes first).GM will provide free repair of the fuel tank.
Fuel pump module leaks gasoline
Odi has received reports that the fuel pump module leaks fuel and or vapor underneath the vehicle.GM states, the failure mechanism is corrosion of the fuel pump module flange which May lead to a fuel leak.corrosion of the fuel pump module flange is the result of the vehicle operating in a corrosive environment.odi has upgraded this pe to engineering analysis (ea07-009) to further assess this issue.
Fuel spillage during refueling
This investigation was opened on the model year (my) 2003 Chevrolet trailblazer.based on GM's information request (ir) response, odi added to its analysis the my 2003 GMC envoy and Oldsmobile bravada vehicles.these vehicles share the same vehicle platform (GM 360/370) and fuel fill components.incident summary numbers reported above include these vehicles.epa regulates the fuel dispensing rates at filling stations…
Fuel pump module leaks gasoline
During the course of this ea investigation, odi observed that the majority of the complaints (88%) and warranty claims (94%) were reported for vehicles that are registered for use in the salt belt region of the us.this area includes 20 states in the northeast, mid atlantic and the midwest regions and the district of columbia.consumers in the salt belt region reported to odi that they could smell fuel vapors in their…
Fuel System complaints in other Envoy XL years
Frequently asked questions
How common are fuel system problems on the 2003 GMC Envoy XL?
NHTSA has 63 complaints about the fuel & propulsion system of the 2003 GMC Envoy XL, 28% of the model year's 228 complaints. The component named most often is storage › tank assembly (12 mentions).
Is there a recall for 2003 GMC Envoy XL fuel system problems?
No. NHTSA lists no fuel & propulsion system recall for the 2003 GMC Envoy XL, though it has 3 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 XL fuel system problems start?
Half of the complaints with a recorded mileage happened before about 70,000 miles, and 9% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 5 injuries to fuel & propulsion 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.