2023 GMC YUKON Complaints

While driving on the interstate at 75mph the vehicle shutdown and would not allow a restart. I had to coast over to the emergency lane with no engine power. Once stopped the vehicle would not start. After having the vehicle hauled to the dealership I was informed that the engine had locked-up and a new engine would have to be ordered and replace the engine. The dealership could not provide me with a repair date because they said GMC has lots of problems with this engine and it would be backordered.

Engine blew up on interstate and left the vehicle in mobilized with only 60,000 miles and all regular maintenance was completed just catastrophically shut off and would not start in the middle of the interstate

Our Yukon Denali at around 34k miles lost power while in motion, it automatically put it in neutral and said try to restart. Rolled to a stop in a turn lane and when we tried to start ignition…nothing happened. On star was called and ran diagnostic, showing no issue. Towed vehicle to dealership and the engine seized up. 4 piston rods had broke and the engine needed to be rebuilt.

We were driving uphill on the highway, about 60 mph when the engine appeared to loose some power for about 10 seconds even though the engine was reving higher, and the ln the engine cut out. We coasted to a stop and then the electrical system was cutting out. I tried to restart the engine but it would not turn over at all, and the car’s electrical was intermittent. There was no warning or error lights before or during the engine failure. Photos provided are the messages on the instrument cluster when attempting to restart the engine. Vehicle was towed to the local GMC dealership, and they are replacing the engine under warranty. No eta on the engine replacement at this time.

My vehicle was being driven by my Nanny and had my children in the car, the engine started making a strange noise so she was required to pull over on a busy highway bridge in Tulsa, OK. There was no warning of any issues with the vehicle before this incident. It then would not start and had to be towed to a GMC Dealership in Broken Arrow, OK. They informed me the entire engine is locked up and has to be rebuilt.

Our 2023 GMC Yukon XL Denali that has suffered multiple severe mechanical failures well beyond what is reasonable for a vehicle of this class. G At approximately 14,000 miles, the vehicle’s 6.2L engine catastrophically failed, rendering it inoperable and requiring a full engine replacement. The engine seized and failed while operating the vehicle with her 3 small children on board and nearly caused a catastrophic accident. As a result, the vehicle was out of service for eight weeks, an unreasonable disruption and an unacceptable failure for a luxury SUV of this caliber. Now, (02/11/2025) at just 20,400 miles, the vehicle’s injectors have failed, further reinforcing that this vehicle is defective, unreliable, and unfit for continued ownership. This vehicle was purchased with the expectation of owning a dependable, high-performance SUV—not one plagued with major mechanical failures at such low mileage. The repeated, severe defects have substantially impaired the vehicle’s use, value, and safety, leaving use without reliable transportation for extended periods. Given these circumstances, it is clear that this vehicle does not meet the quality and durability standards expected from General Motors’ flagship SUV lineup and present SERIOUS risks of catastrophic injuries and/or death.

Motor locked up and went into neutral on it’s on driving 60mph. I was able to restart the vehicle and then it completely shut down at red light in a main intersection.

Vehicle suddenly lost all power at speed, coasted to a stop. No waring indicators, stopped in a lane of traffic, speed limit was 55mph. Engine is now seized.

At around 23,000 miles the vehicle collapsed a lifter - Took it to a dealership, fixed the lifter and asked them to confirm that the lobes of the cam were good and that all bearings were in good shape - approximately 2 weeks later, complete engine failure on a busy highway, no good place to pull off the road, no reimbursement for towing bill, no rental car - dealership put new motor in (took 5 weeks and GM did nothing to help us with the situation) and now we have the same bad 6.2 liter motor in the vehicle that is likely to fail again withing the 25,000 miles. Manufacturer refused to answer specific questions about the motor and could not tell me if this new motor was built to satisfy this known issue - the new motor has the same part number as the previous motor so consensus is that it has the same failure possibility leaving family in a dangerous place on the roads. GM still refuses to discuss this with us as the customer!

While driving my 2023 Yukon Denali on [XXX] towards [XXX] , the check engine light came on and my truck stopped hard as if I jammed the brea but my foot was still on the gas and the RPM’s was moving. I was lucky that I was in the far right lane and there was no car behind me at the time or I would have caused an accident. I after 30 minutes waiting on the side of the road, I started up my 2023 Denali after letting it sit and put it in drive and drove 30 mph because I did not want to take the chance of my suv stopping abruptly again. I contacted a GMC Dealership and explained the situation and I told I am on my own and I would have to pay up to $10,000 for a engine and it would be no guarantee of being reimbursed by GM should I need a engine. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)