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 2006 GMC Envoy owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2006 GMC Envoy. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power. The failure occurred on three separate occasions. The vehicle was taken to an independent mechanic and diagnosed with fuel pump and fuel pump sensor failure. The fuel pump and fuel pump sensor needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 270,319.
At every fillup we can smell gas like there is a fuel leak. I had a shop do a fog test and they confirmed a leak "somewhere from the top of the tank". The tank would need to be dropped to visually inspect at a cost of $400-$500 just for the dropping of the tank. Then there would be added costs to repair whatever is causing the leak and smell of gas. After hearing that I came home to start my searching for recalls & safety notices to find that GM had a notice issued as well as the NHTSA, but it seems they cut the year off at 2004 & 120,000 miles. According to the thread below, it appears this was extended to vehicle under 150,000 miles which we are well under, but we don't have a 2002-2004 model. …
Hi ! As many other GMC Envoy costumer stock at the earlier 50-100 thousand milles with engine problem caused by misfire cylinder . I do a have a problem with my SUV engine the classic misfire #6 cylinder that it cost a $2000 or plus to get repair , short worlds loosing the engine . If you guys check about this issue is extremely big and horrible thousand people a cross the country dealing with this issue .I did noticed this issue just driving , I got to stop sign and the engine starts shaking and the check engine come on , after I took to a mechanic shop for diagnostic and put about $200 dollars on spark plugs and coil and noting changed I was tell by the mechanic that it was a lower compression on the 6 cylinder so bad valve .
My husband and I were traveling when the vehicle shut off with no warning at all and all the dash board lights came on. The vehicle would not restart but would turn. This happened Saturday 9/2/17 on a country highway out in nowhere . We called a tow truck. Thank god for cellphones. On 11/12/2016 hub bearings replaced. 11/15/16 module and connector replaced and fuel level sensors and ring replaced. Three years ago A/C went out. Replaced.
Initially, when the car was filled with fuel, it immediately indicated that the car was empty and the engine light came on. Once you used a couple of gallons the fuel gauge began working and the engine light went off. Just recently the system is not correcting itself and the fuel gauge will constantly go between full and empty so I never know how much fuel I have in it. Also the engine light is remaining on.
Investigation # dp10001: the petitioner alleges that the fuel tank level sensor is defective and could result in a subject vehicle running out of fuel, stall, and being rear ended by another vehicle. Odi will evaluate the petition for a grant or deny decision. GM will fix till 2016 my 2006 Envoy has only 75,000 miles on it
Ignition switch failure at speed causing loss of power to fuel pump which ultimately meant loss of power to vehicle at freeway speeds. Was told by GM that there is no recall on this particular ignition switch at this time.
Driving to work at 5 am about 3/4 of mile from home, auto slowed, headlights deemed slightly, RPM's fell. Barely able to coast auto to side of road. Call for roadside assistance. While talking to agent I open door and smelled gasoline. Agent informed me to call fire department to ensure auto safe to move. Fire department arrived and said fuel was still dripping from auto, but they did spread something on fuel and waited until rollback removed auto. Auto was taken to GM dealer for repairs. When notified of repair completion I went to dealership. They told me I must have ran over something that pulled fuel line off, and that it was a 1 in a million event. I did not run over anything so I did not believe this statement. I research and found other have had same problem. …
Fuel gauge is not working properly on my vehicle. It stays on "e" when there is plenty of gasoline in the car. There have been several complaints about this that I have seen on websites. Occasionally the gauge will move up but then go back to "e". I went to dealer and they said it is a bad fuel senor gauge which is in the gasoline tank. Seems like this is a common issue and could cause other problems. The fuel gauge has been like that for over 6 months, as the cost was astronomical and I believe there should be a recall. Additionally, recently my oil pressure gauge has shown the max amount and then last night it went down to the lowest amount on the instrument panel. It goes back and forth from high to low and the oil pressure low light comes on the instrument panel and then goes off. It says to stop engine. …
We have a 2006 GMC Envoy with 46,952 miles on it. One day in April 2011, with a 3/4 tank of gas, I was driving to work and the gas gauge dropped unexpectedly to empty. The bells started going off the messages came on the dash, the engine lights came on. This literally scared me to death. I thought the gas tank had ruptured and that all my gas had leaked out. I was terrified that the vehicle would come to an abrupt stop in the middle of the street. I made it to work and immediately looked under the vehicle to see if anything was leaking. There was nothing. I went into work and worried all day about how I was going to get to a gas station. When it was time for me to go home, I started the Envoy and the gas gauge read back to the 3/4 full tank. I started on my way home and all of a sudden the gauge dropped again. …
NHTSA investigations
Fuel Level Gauge System Failure
The Office of Defects Investigation has received 668 complaints alleging inaccurate fuel gauge reading while driving in model year 2005-07 Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x vehicles.Of the 668 complaints, 58 incidents were alleged to result in a vehicle stall.Of the 58 stalling incidents, 43 complaints reported stalling because the fuel level reading indicated more fuel availability than…
Fuel System complaints in other Envoy years
Frequently asked questions
How common are fuel system problems on the 2006 GMC Envoy?
NHTSA has 207 complaints about the fuel & propulsion system of the 2006 GMC Envoy, 47% of the model year's 436 complaints. The component named most often is storage › fuel gauge system (3 mentions).
Is there a recall for 2006 GMC Envoy fuel system problems?
No. NHTSA lists no fuel & propulsion system recall for the 2006 GMC Envoy, though it has 8 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 2006 GMC Envoy fuel system problems start?
Half of the complaints with a recorded mileage happened before about 65,000 miles, and 2% before 25,000 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.