GMC Complaints

The image module system has completely failed and never worked in the Yukon. Then it would brake while still accelerating.

Faulty lifters replaced on passenger side. Had only 25000 miles on engine. GM extended warranty on thousands with this engine but not mine. Have only 28000 miles on truck and just turned 5th year so warranty is void. GM should extend warranty on all vehicles with this engine.

12/16/25 (evening): Warnings began cycling across the screen: 1) Service ESC, 2) Vehicle Leveling for Stability, 3) Rear Axel System Off, 4) Engine symbol began flashing, and 5) Service Traction Control. I felt vibration/bouncing while driving as well. 12/17/25 9 AM: Took 2021 GMC Yukon Denali to GMC dealership. They ran a computer scan and reported a misfire, but nothing else appeared to be wrong. They told me that sometimes a low battery can cause the warning lights and messages to cycle. They recommended that I keep driving it and return if the warnings appeared again. 12/17/25 9:18 AM: I left the dealership. I drove 4.5 miles, and all the same warning lights came back on. When I pulled into a parking lot, it smelled like my engine was on fire, and dark smoke was coming from my rear exhaust pipe. I called a flatbed tow truck and had the car returned to the dealership. Mileage: 52,285 GMC 2021Yukon Denali XL 6.2L V8 engine Well-maintained with regular oil changes. The dealership told me there was a lifter failure and that the engine could be damaged and would need to be replaced if the cam, pushrods, etc., were damaged. They also told me I was out of warranty by less than 60 days. The dealership said my warranty expired in October 2025, even though my vehicle is a 2021 with only 52,285 miles. They just informed me that the left lifter was replaced at 6,000 miles and that they will replace the right lifter. I am concerned about further damage down the road, given the recalls on the GMC 6.2L engines.

The contact owns a 2022 GMC Yukon XL. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate, and the engine stalled. No warning lights were illuminated. The contact stated that the failure occurred while driving on a busy highway, and the contact's wife and four minor children were also occupants of the vehicle. The contact stated that the incident was significantly scary. The vehicle was driven to the shoulder of the road, which the contact considered unsafe for him and his family. The contact stated that both the contact and his family, which included a one-year-old child, had to walk to a safe location and sat for more than 40 minutes. The vehicle was towed to the dealer, where it was diagnosed that the engine had failed and needed to be replaced. The vehicle was not repaired. The dealer informed the contact that the repair was covered under NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling), but the repair could take two months, and the parts needed to be ordered. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 72,020.

While driving down the highway the top part of the front of the grill flew off bounced over top of my vehicle and landed on the ground in the highway where the car behind me then ran it over and it blew into the median. I notified my local GMC dealer who said there is no active recall. Filed a complaint with GMC as this is a known issue and has already been recalled on the 2022 model. They reviewed and denied my claim at this time. It is a known manufacturer issue and creates a highway hazard if they continue to blow off and possibly hit or injure athers

The Intermediate speed sensor 2 and internal transmission harness failed. The repair was to replace the internal transmission harness and intermediate speed sensor. This vehicle is a 2021 and I was told this was recalled on a 2022 only.

I was driving (roughly about 30 MPH) when my automatic braking kicked on and caused my tires to squeal to a halt. There were no other cars around me (thankfully) - otherwise I would have been rear-ended. Right before it stopped, it flashed the warning lights for a quick second. I wanted to report this issue in case others are experiencing the same problem and to hopefully help prevent it from happening to someone else. Very scary and could cause a serious accident. I turned off all of my automatic brake settings after the incident, as I believe it is faulty and don't want to risk it happening again.

Started car via remote start. When I went out to the car I noticed smoke in the cab. I then observed the rear power slide window to be smoking and further discovered the rear defroster wires the be smoldering creating considerable smoke. The tempered glass then began to spider and completely cracked. There is a former recall on the rear slide window involving fire hazards and the wiring components. It should also be noted that our 9 month old’s car seat is directly below the window and defroster wiring were the smoldering took place. No warnings lamps were observed prior to the incident.

I am writing to formally file a complaint regarding a serious and ongoing issue with my vehicle that has placed my safety at risk and resulted in significant inconvenience and financial burden due to General Motors’ failure to honor my warranty in a timely manner. While driving on the highway, my vehicle suddenly began losing power and displayed flashing warning messages indicating that it would not shift into gear or out of gear and that power could be lost. This created an extremely dangerous driving situation and posed a serious safety risk to me and other motorists. I brought the vehicle in for warranty service, but General Motors was unable to honor the warranty repair in a timely manner. As a result, I was without my vehicle for several months while it sat undrivable on the dealership lot. Once the vehicle was finally repaired and returned to me, the exact same transmission-related incident occurred again. Once again, I was left without the vehicle for an additional period of days. This repeat failure has severely shaken my confidence in the reliability and safety of the vehicle. When I picked up the vehicle after the subsequent repair, I was informed by a General Motors technician that the brakes and rotors were most likely pitted and damaged and would need repair or replacement because the vehicle had been sitting undrivable for such an extended period of time. I was explicitly told this damage was expected due to the prolonged inactivity caused by the unresolved warranty issue. It is critical to stress that the vehicle only sat undrivable for such a long period of time as a direct result of General Motors’ inability to honor the warranty in a timely manner. Despite this, I am now being told that the brake and rotor damage is considered a “maintenance issue,” even though a General Motors technician directly advised me that this damage would occur as a consequence of the vehicle sitting for months due to warranty delay

Upper grill trim panel broke off while on highway and went flying over the truck while at highway speeds. Same issue as existing recall for the 2022 model.