2005 GMC Envoy Problems

What owners report

Owners of this model year most often describe an inaccurate fuel gauge, usually traced to the fuel level sensor or sending unit in the tank, and a speedometer that reads erratically or sticks. These complaints arrive across a wide mileage range, from under 30,000 miles to well past 150,000, with many clustered between 45,000 and 100,000 miles. A smaller but recurring set involves headlights that flicker or briefly go out, and engine cooling or oil-pressure readings.

1. 1
   Fuel system

   Fuel gauge reads empty or fluctuates

   • 206 complaints (42%)
   • median 75,000 mi at 6.0 yrs old (172 state mileage)
   • 2 mention a crash, fire or injury
   • owner-quoted repair $600 (median of 31 quotes)
   • filed 2006–2019

   Complaints describe a fuel gauge that shows empty right after a fill-up, then drifts up and down or settles at empty while the tank is full. Several owners say the low-fuel light and chime come on when there is fuel in the tank, and some report running out of gas as a result. Dealers and mechanics quoted in the complaints typically identified the fuel level sensor or sending unit, and some owners were told the repair was not covered by a recall. Reported from roughly 25,000 to 110,000 miles, appearing shortly after refueling in many accounts.

   What to check: Fill the tank and confirm the gauge reads full and stays stable; ask whether the fuel level sensor or pump module has been replaced.

   2 excerpts from owner complaints in NHTSA records

   “One day I filled up my gas gage and it read empty when I drove away. It has read empty ever since with the exception of moving slightly above e for a few min shortly after filling tank. This happened in feb 07 and I just have not had the money to drop on a gas gage so I calculate my miles which is extremely inconvenient and I have run out of gas on several occasions.”

   NHTSA complaint #10365446, filed 2010-11, 25,000 miles

   “The fuel level reads empty when I have just filled the tank. Then when I drive for little while the level reads half full then goes back to empty. There is no way to tell how much gas is in the tank. The fuel level gauge is sometimes moving back fast to empty while driving.”

   NHTSA complaint #10334380, filed 2010-06, 90,000 miles
2. 2
   Electrical system

   Speedometer sticks or reads wrong speed

   • 83 complaints (17%)
   • median 80,000 mi at 6.2 yrs old (73 state mileage)
   • 1 mention a crash, fire or injury
   • owner-quoted repair $480 (median of 9 quotes)
   • filed 2005–2020

   Owners describe the speedometer needle pegging high, dropping to zero, or freezing at a fixed speed while the vehicle is actually moving or even parked. Some say the fault appears after an hour or more of driving and clears when the vehicle is restarted. Complaints mention a mechanic advising instrument cluster replacement, a suggested ground-connection cleaning that did not resolve it, and quotes of several hundred dollars for the cluster. Mostly reported between about 50,000 and 100,000 miles, sometimes earlier.

   2 related service bulletins

   What to check: Drive the vehicle at a steady speed and compare the gauge against a phone GPS; ask whether the instrument cluster has been repaired or exchanged.

   2 excerpts from owner complaints in NHTSA records

   “In december of this past year (2012) my 2005 Gmc Envoy began to have issues with the speedometer. I would be traveling down the a busy road at a traffic light barley moving and the speedometer would read 80mph. The needle would fluctuate anywhere from 20 MPH all the way up to 120 MPH and peg there. One occasion the speedometer would go back to normal 0 MPH and work normally, but now that is an extremely rare occurrence.”

   NHTSA complaint #10498340, filed 2013-02, 63,000 miles

   “The speedometer stops working after about two hours of driving. It goes to zero. It sometimes starts again if the vehicle is stopped and started again, but it will quit working if a long drive continues. It works perfectly when driving around town on short trips. The service bulletin apparently says to clean ground connection . However, this did not fix the problem. I am told I need to have speedometer replaced at a cost of over $600.00.”

   NHTSA complaint #10522432, filed 2013-06, 118,600 miles
3. 3
   Exterior lighting

   Headlights flicker or cut out while driving

   • 63 complaints (13%)
   • median 90,000 mi at 6.1 yrs old (44 state mileage)
   • owner-quoted repair $675 (median of 5 quotes)
   • filed 2005–2021

   Complaints describe headlights, dash lights and tail lights dimming or shutting off while driving at night, sometimes coming back on after a bump. Several owners mention high beams activating on their own when the lights drop out, or dimming tied to a low battery gauge reading. According to the complaints, dealers tightened ground connections, replaced alternators, or told owners nothing was found; some were told the behavior was normal. Reported from very low mileage up to about 150,000 miles, often after dark or shortly after startup.

   3 related service bulletins

   What to check: Check headlamp operation and battery voltage at idle and with accessories on, and ask whether ground connections or the alternator have been serviced.

   2 excerpts from owner complaints in NHTSA records

   “While I was driving on the ramp, my headlights started to flicker in and out. At one point the lights went completely out. After hitting a bump in the road the lights came back on. Went to the mechanic and they were not able to find anything wrong.”

   NHTSA complaint #10520034, filed 2013-06, 130,000 miles

   “Gas gauge has not worked since 2007. Headlights and some dash lights as well as ext temp gauge sometimes flicker. No positive response from dealer for gas gauge. Was initially told headlights were supposed to do this, a feature . I asked them to document this for me, they said they would look at it. Replace body control module, no change. Said it could be this or that, but out of warranty at my expense. I told them I would pay for it, but if it did not fix the problem I would not. They refused to work further on it.”

   NHTSA complaint #10265211, filed 2009-04, 56,000 miles
4. 4
   Electrical system

   Engine stalls or cuts out unexpectedly

   • 77 complaints (16%)
   • median 79,032 mi at 6.4 yrs old (55 state mileage)
   • 10 mention a crash, fire or injury
   • owner-quoted repair $600 (median of 7 quotes)
   • filed 2005–2026

   Some owners report the engine shutting off while driving at city or highway speeds with no warning, with everything electrical going dark at the same time. In one account the engine quit on a ramp and braking assist was lost; in others the vehicle restarted after being pulled over. Complaints describe dealers unable to duplicate the problem or find a cause. Scattered from about 7,000 to 130,000 miles, often during ordinary driving rather than under load.

   What to check: Ask whether the ignition switch, battery cables and grounds have been checked, and note any history of stalling or no-start reports.

   2 excerpts from owner complaints in NHTSA records

   “When I went out to start my car it wouldn't start so I took the key and my dad my be I need a jump he said no if that was the case the car wouldn't even turn over. I went back out to try it again but still nothing so I began to turn the key back and fourth and eventually it stared. A few minutes the cigarette outlet caught on fire so I unplugged my car charger.”

   NHTSA complaint #10655355, filed 2014-11, 18,661 miles

   “I was driving home from work entering the freeway on ramp. The ramp is controlled by a signal and I was waiting my turn when the engine failed. I was coasting downhill into another car when I hit the brakes and there were no brakes. I bumped the car in front of me damaging the front grill and hood of my car. Submitted the car to the dealer for evaluation of an electrical problem. The dealer has been unable to duplicate.”

   NHTSA complaint #10152787, filed 2006-03, 7,000 miles

Buying note. On a used example of this model year, verify the fuel gauge and speedometer both work correctly on a test drive, including after a fill-up, and check headlight and charging behavior at idle. Service records showing fuel level sensor, instrument cluster or ground-connection work are worth asking about.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.