GMC Complaints

Engine shut off at freeway speeds (65mph) on 2 occasions. Driver was able to coast over to side of freeway both times. On 1st occasion CHP protected vehicle from other traffic on i-5 with safety lights and traffic control. On second occasion, tow truck came quickly and kids were evacuated to prevent heat stroke in 113 degree weather. The first incident was “repaired” with a new starter and battery fuse block at 21720mi, but only lasted to 21814mi before same event occurred. No warning of failure before or after incident, just a dead engine. Second event (7/2/2024) is still being investigated by dealership.

I hit a pot hole and a stabilitrack error popped up. Also reduced engine power I was miles from home and could have easily caused a major accident on the road.

The forward collision light comes on and stays on for no reason while driving. The only way to reset is to cycle the key. Took it to the dealership with the light on and they said no problem found.

142,000 miles and timing chain is bad. A very known issue and a very common issue in the GMC Acadia Denali which I think should be repaired by GM! I only owe $4,000 on the car and it's going to cost me 3,000 to get it fixed that is ridiculous so I think you should stand behind your workmanship and your quality of vehicles that you build GM and fix it take care of your customers as we keep buying this type of junk

I am writing to express my concerns and frustrations regarding the recurring issues with my vehicle despite multiple service appointments at Classic GMC Arlington. Despite numerous attempts to address these problems, I continue to experience issues with Continuity of service and performance Fueling system and coolant system problems (twice in six months) Stabilizer link light illumination during startup RPM acceleration while slowing down or stopping Ticking sound from the engine. Each time I bring my vehicle in for service, I am told that there are no issues with the performance, idle, or spark plugs, despite having recently received a full service tune-up. I suspect that there may be intentional damage or tampering with my vehicle, which is causing these persistent problems.I have not had any prior issues or service lights illuminated before, and there were no incidents reported by the previous owners. I believe there may be fraudulent activity involving the manufacturer and service providers. schedule a thorough inspection and diagnosis to address these recurring issues.

Drivers side door caught on fire overnight. Burned up the interior of the vehicle and smoldered out. Windows were up, car was completely closed and locked. Still starts and drives. Door, seat, steering, ceiling , visor all burnt and melted to some degree. Seems to have been electrical.

Every time I start the vehicle and open the door and close the door, the driver side mirror, rearview mirror, either moves all the way out or moves all the way in which is a safety concerns. I can’t see the traffic on my left side and behind me.

Truck reads power steering problem and does not allow me to turn my steering wheel.

On 4-5 occasions since purchasing a new 2021 GMC Yukon Denali the automatic breaking function has engaged for no reason, with no obstruction in the roadway. It has occurred at low speed (after disengaging break and starting to drive). Obviously, this is a major safety issue.

after driving for a few minutes when down shifting vehicle will lock gears making the rear tires slide until a loud pop. May drive fine for a few miles again then reoccurring at any speed dealer said to drive it on SAFETY CONCERN but i did. truck has been at dealer for 2 months now. but am aware of more than mine with the same problem at the same dealership located at laura buick gmc in collinsville illinois