2008 GMC Envoy Problems

What owners report

Owners of the 2008 Envoy most often describe low-beam headlights that go dark intermittently while driving at night, and engine shut-offs or no-starts that shops traced to the ignition switch. Reports arrive from a wide mileage range, from under 50,000 to well past 150,000 miles, and the failures are usually intermittent rather than a single clean break, so a short test drive may not show them.

1. 1
   Exterior lighting

   Low-beam headlights go out while driving

   • 16 complaints (21%)
   • median 142,000 mi at 9.0 yrs old (12 state mileage)
   • filed 2014–2019

   Owners describe the low beams cutting out without warning while driving at night, with the high beams still working, and sometimes the lights return after the vehicle is restarted. Several say bulbs, fuses and relays checked out fine, and some shops pointed to the headlamp driver module. Complaints note that this model year was not covered by the earlier campaign for other years, and some owners were told the failure could not be reproduced. Reported from roughly 27,000 to 227,000 miles, most often during nighttime highway driving.

   1 related service bulletin

   What to check: Test the low beams at night, including after a cold start and after cycling the switch, and ask whether the headlamp driver module or headlamp relay has ever been replaced.

   2 excerpts from owner complaints in NHTSA records

   “My dim lights have quit working recently on my 2008 Gmc Envoy while driving down the highway. Has happened 4 times so far. Last time was 11/2/16. Bright lights still work. I found a Gmc recall on years 2006-2007 ref the headlamp driver module which causes this problem. It seems they should include this year also. Extremely dangerous situation.”

   NHTSA complaint #10923972, filed 2016-11, 142,000 miles

   “My dim lights have quit working recently while driving down the highway. Has happened 4 times so far. Last time was 11/2/16. Bright lights still work. I found a Gmc recall on years 2006-2007 ref the headlamp driver module which causes this problem. It seems they should include this year also. Extremely dangerous situation.”

   NHTSA complaint #10923970, filed 2016-11, 142,000 miles
2. 2
   Electrical system

   Intermittent stall or no-crank (ignition switch)

   • 12 complaints (16%)
   • median 72,000 mi at 4.5 yrs old (9 state mileage, few)
   • filed 2013–2018

   Owners describe the engine shutting off while driving, sometimes with loss of power steering and power brakes, and other times a no-crank condition where the key must be turned repeatedly before it catches. Complaints say the check engine light may or may not appear, and several report the ignition switch was replaced to fix it, with one mentioning the fuse box as well. One owner reported the engine staying running with the key removed until a relay was pulled. Reported from about 14,000 to 101,000 miles, and several vehicles stalled again after a first switch replacement.

   1 related service bulletin

   What to check: Ask whether the ignition switch has been replaced and whether there is service history for it; during a test drive, try several restarts and note any hesitation or warning lights.

   2 excerpts from owner complaints in NHTSA records

   “In january, 2012, after a day of making several stops (church, visit family, movie), we stopped for a late night dinner). The restaurant was closing, so we returned to the vehicle in less than 5 minutes. When we returned to the vehicle, the car would not start. After several unsuccessful attempts, we had to have the truck towed. Since it was late night, we had to have the vehicle towed to the home and then to a repair shop. …”

   NHTSA complaint #10595952, filed 2014-06, 28,000 miles

   “We have a 2008 Envoy. We bought it brand new in 2008. The ignition switch has quit us 5 times. We usually have some warning. The first 3 times , the check engine light came on but I could eventually start the car and drive it to a mechanic to be checked out. The 4th time we were heading out of town, check engine light came on, my husband pulled over to side of the road and car quit. Would not start, had to tow it to mechanic. This last time, no warning, just quit as I was driving home. …”

   NHTSA complaint #11011223, filed 2017-07, 46,098 miles
3. 3
   Electronic stability control

   Service StabiliTrak light on, traction control active

   • 8 complaints (10%)
   • median 79,665 mi at 6.9 yrs old (6 state mileage, few)
   • filed 2009–2016

   Owners report the StabiliTrak or service stability light staying on or coming on intermittently, and some describe traction control engaging on its own after startup with a resulting loss of power. Complaints say dealers called it a common condition or found no fault, and a few mention the ABS activating during ordinary stops. Several owners also note the air bag light being on at the same time. Reported from very low mileage up to about 100,000 miles, often described as intermittent regardless of weather.

   What to check: Check that all warning lamps do the bulb-check at startup and then go out, and ask whether any stability or ABS codes have been read or cleared.

   2 excerpts from owner complaints in NHTSA records

   “My service stabilitrak and air bag lights has been on since I purchased the vehicle. I have taken it to a mechanic and they stated that they did not see a problem. I was wondering if this is an on-going issue and if there are any recalls for this.”

   NHTSA complaint #10632704, filed 2014-09, 99,214 miles

   “Takata recall when I first start the car and begin to accelerate the traction control system activates causing lose of power - very dangerous when pulling out into traffic. I have to disengage the system on the shift handle to prevent this from happening. I am also experiencing the ABS problem of activation when coming to a stop in all conditions. It is already a recall for Gmc vehicles up to 2004 but obviously not corrected. The traction control system activates every time after first starting the car. The ABS system is sporatic. …”

   NHTSA complaint #10928056, filed 2016-11, 92,000 miles
4. 4
   Engine cooling

   Cracked exhaust manifold and broken manifold bolts

   • 6 complaints (8%)
   • median 90,500 mi at 5.7 yrs old (6 state mileage, few)
   • filed 2010–2014

   Owners describe an exhaust noise that grew steadily louder, and inspection found a crack in the exhaust manifold; other complaints report broken manifold bolts and a sizable repair quote. One owner said the dealer advised not to drive the vehicle until the manifold was replaced. Complaints describe this as a recurring item on these V8 engines. Reported from about 47,000 to 118,000 miles, usually first noticed as a noise change at cold start.

   What to check: Listen for a ticking or muffled roar on a cold start, particularly on V8 vehicles, and ask whether the manifold or its bolts have been replaced.

   2 excerpts from owner complaints in NHTSA records

   “2008 Gmc Envoy 51,000 miles exhaust manifold cracked I had it replaced and was told by dealer a 3 day wait would be necessary as they had used stock parts on another Envoy with same problem . Advised me not to drive because it may catch fire.”

   NHTSA complaint #10357666, filed 2010-09, 51,000 miles

   “Bought the vehicle last november from georgian pontiac buick Gmc in barrie ontario canada last november 2009. Learned I had a cracked exhaust manifold on my 2008 Envoy at 87 000 km. It has not yet been repaired. Research is ongoing.”

   NHTSA complaint #10349800, filed 2010-08, 87,000 miles
5. 5
   Other or unknown

   Seat belt buckle or retractor will not release

   • 5 complaints (6%)
   • median 53,000 mi at 6.6 yrs old (5 state mileage, few)
   • filed 2013–2026

   Owners describe seat belts that lock and will not release, sometimes trapping an occupant until the belt was cut or the person climbed out of the vehicle. Complaints say the release button jammed or the retraction mechanism failed, and shops recommended replacing the whole belt assembly. One owner replaced a belt at their own cost and said the replacement behaved the same way, though less often. Reported from roughly 47,000 to 120,000 miles, in both front and rear seating positions.

   What to check: Buckle and release every seat belt several times in each seating position, front and rear, and ask whether any belt assembly has been replaced.

   2 excerpts from owner complaints in NHTSA records

   “Passenger front seat belt does not work properly after attaching to proper seat connector seat belt locks up and no forward movement is allowed in non emergency situations. Seat belt must be detached as it is in a locked position. Upon unlocking belt returns to normal action. Belt must be reconnected and positioning must be retried sometimes requiring disconnection yet again. Belt was replaced at owners cost. Replacement belt has the same issues but not as frequently as original belt. Total cost to owner approx. …”

   NHTSA complaint #10945399, filed 2017-01, 50,000 miles

   “The contact owns a 2008 Gmc Envoy. When the contact parked the vehicle and attempted to exit, the seat belt would not release. The contact had to physically climb her way out of the vehicle. The red button to release the seat belt was jammed in the down position. The dealer and manufacturer were not notified. The vehicle was not diagnosed or repaired. The failure mileage was 120,393.”

   NHTSA complaint #11288627, filed 2019-12, 120,393 miles

Buying note. Check the low beams at night and exercise every seat belt before buying, and ask for records on the ignition switch, headlamp module and exhaust manifold. Because most of these complaints describe intermittent behavior, a short test drive may not reveal them, so service history matters as much as the inspection.

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.