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 owners, lightly cleaned up (personal details are redacted by NHTSA).
I can not put gas in my car. M garage smells of gas fumes. Very dangerous situation of possible fire or illness due to fumes ans I have no transportation. When I bought this car from GMC it had the sam problem. no recall just a safety bulletin. Manufacturer fixed it.There were no warning lights.
Bulletin no.:14423 date: November 2015 part number: 15077622 tank, fuel (18.7 gal.) the icv is located above the full fuel level. A fractured icv could allow fuel vapors to pass through and droplets of fuel to accumulate on the side of the fuel tank as it passes over the fracture during refueling. If the icv fractures, the vehicle's service engine soon (ses) light May illuminate, and you May notice a fuel odor and/or a few drops of fuel on the ground when refueling the vehicle. This has happen to me and now my tank needs to be replaced. This is a known issue with GMC Envoy regardless of year or how long they are in service. The company needs to be held accountable for poor quality of parts especially when it is a safety concern and hazard with fuel odor coming into the cab of the vehicle and spilling out when going up a hill. …
It started with engine misfiring causing engine to jolt which damaged #4 coil pack seal to failed allowing water intrusion. In 2008, the GMC mechanic replaced all six coils seals but in 2013-present p0440 engine code is a leak in the evaporative emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the p0440 code. I failed a few smog check spending hundreds of thousands of dollars yet my problem still existence. I've contacted the bureau of automotive repair because purrfect auto in fullerton,ca lied about fixing my car. The bar made purrfect auto replace the gas tank and gas cap yet the engine light is still on displaying code p0440. Its been 14 years and I'm still dealing with this problem.
Tl contact owns a 2003 GMC Envoy. While idling at a traffic light, the contacts vehicle was rear ended. The dealer stated that the gas tank was cracked on the vehicle. A geico representative assessed the damage and stated that the cracked gas tank was the result of safety recall # 02V121000 (fuel system, gasoline:delivery:hoses, lines/piping, and fittings). The rear bumper and hitch were damaged due to the crash. A police report was filed. The purchase date was unknown. The current mileage is 42,000 and failure mileage was 41,000. The consumer provided a police report and pictures of the damaged vehicle. Updated 11/08/07.updated 02/20/15 updated 02/20/15
Tl* the contact owns a 2003 GMC Envoy. The contact stated that a strong fuel odor emitted inside and outside of the vehicle continuously. Additionally, the engine warning indicator illuminated whenever the vehicle was in operation. The contact received notification of the manufacturer customer satisfaction program related to the fuel tank inlet valve replacement. The remedy part needed to perform the repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the repair. The manufacturer was notified of the failure. On November 23, 2015. The failure mileage was 119,292. Updated 07/05/16
Tl* the contact owns a 2003 GMC Envoy. The contact stated that there was an abnormal odor coming from the rear of the vehicle. The contact inspected the rear of the vehicle and discovered that the fuel tank was damp. The vehicle was driven to an independent mechanic where it was diagnosed that fuel tank sending unit had corrosion and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 99,991.
2 years ago the maintenance required light has been on, when checked by 2-3 mechanics they said it could be the gas cap. That didn't remedy the situation, the light stayed on, then recently the fuel gauge started dropping to empty after a little less than half a tank was used. Then filling the gas tank caused it to overflow if you fill it to full. As of today the car when shifted into reverse, something came loose inside the shifter, now it is stuck in neutral.
Tl* the contact owns a 2003 GMC Envoy. The contact stated that the check engine warning light remained illuminated. The vehicle was taken to an independent mechanic who diagnosed that the filler neck of the fuel tank was cracked and needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 123,000. Updated 3/24/15 updated 04/02/15
Tl* the contact owns a 2003 GMC Envoy. While the vehicle was in the garage and while driving, the odor of fuel was present. The vehicle would also shudder and hesitate while driving. The vehicle was taken to the dealer where it was diagnosed that the fuel pump was faulty and needed to be replaced. The manufacturer was notified of the failure. The failure mileage was 145,000.
Tl* the contact owns a 2003 GMC Envoy. After refueling the vehicle, there was a strong fuel odor present. The contact noticed the fuel tank was leaking fuel. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 120,000.
NHTSA investigations
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 years
Frequently asked questions
How common are fuel system problems on the 2003 GMC Envoy?
NHTSA has 94 complaints about the fuel & propulsion system of the 2003 GMC Envoy, 24% of the model year's 394 complaints. The component named most often is storage › tank assembly (11 mentions).
Is there a recall for 2003 GMC Envoy fuel system problems?
No. NHTSA lists no fuel & propulsion 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 fuel system problems start?
Half of the complaints with a recorded mileage happened before about 90,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 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.