GMC Complaints

Driving down highway at 60 mph and truck shut off. had to try to get it over to the shoulder to off the travel lane. Dealer found wire harness chaffed at front left shock tower ECM bracket. Several wires damaged, repaired and cleared codes. This could have been much worse had I been in heavy traffic and needed to cross additional lanes of traffic to park in a safe area. I had no power steering and limited space to park the truck. I called to police to have a car dispatched to park behind me so the truck could be loaded on a tow vehicle to bring it to the dealer. This could have been worse had my wife been driving.

Going down beltway at 80mph on November 18 2024 the vehicle lost engine power. I had to drift vehicle across 3 lanes to shoulder and called tow truck to take to dealership. The dealership informed me that the engine had went bad and needed to be replaced. The vehicle had 63k miles on it and was out of warranty and they want me to pay 4k to replace.

The engine seized up at approximately 20,000 miles while exiting the highway. I took the vehicle to GM and they needed to replace the entire engine. I was told it was a common problem with the 6.2 engine by the service manager.

The vehicle stopped, and I was unable to manually put it in Neutral. I had it towed to the dealership and was told that my engine was froze up. I have 25,000 miles on my Denali. This is not normal. My truck just "stopped" and would not move on a busy traffic road- why are the vehicles failing at less than 30,000 miles? I still owe quite a bit and now wondering what is going on with GM? I saw the video on Tik Tok about engine failures and this is my truck.

The contact owns a 2022 GMC Yukon XL. The contact stated that while his wife was driving 60 MPH, the vehicle lost motive power, prompting the driver to pull over to the shoulder of the roadway where the vehicle then stalled and was unable to be restarted. No warning lights were illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the engine due to metal fragments being found in the engine. The contact was informed that the engine needed to be replaced. The vehicle was not yet repaired. After investigating the failure, the contact related the failure to NHTSA Action Number: PE25001 (Engine and Engine Cooling). The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 44,000.

L87 Engine suddenly, withoiut warning started having a severe engine rod knock. Safety put at risk because the engine could blowup and lock vehicle up. Dealer confirmed rod knock and will replace engine under warranty. ZERO prior indication (No SES or other warning lights).

Not even 100,000 miles on it and the engine blew. Started with a lifter issue. Everyone I talk to with Yukons and GMC in general say it’s a problem. Just a search on the internet shows that they all have this issue… a well maintained car should not have this issue and it’s clearly a GMC issue and it needs to be fixed. The repair shop can’t even order me a new engine due to this being a real problem all over with GMC.

Upon cold start vehicle rattles when idling down and growling noise when accelerating upon left or right turns. Also, has constant vibrations with sound of metal rattling at speeds above 30 mph. Forward collision light on without a significant amount of mileage on vehicle. I have taken my vehicle to dealership at least 5 times referencing the vibrations. Growling noise was heard by service advisor last visit October 2024, and he stated it probably were the tires. I advised him that brand new tires were put on vehicle, April 18th 2024, rear vibration has never stopped from time of purchase. I have asked dealership to check drivetrain as it is a know issue for 21 Yukon Denali. Vehicle has not received recall but was manufactured at Arlington plant where the parts of the drive shaft was not properly heated and differential is known for issue upon cold start. Vehicle powertrain warranty is due to expire August 2025 or 60,045 mileage. Therefore with that, the vehicle was placed in service August 2020 months before unproperly heated driveshaft recall was determined. My vehicle should be on the list for this recall as GMC noted this to have occurred on vehicle prior to 07/2021. In addition, a chirping noise comes from front of vehicle while idling and when automatic stop starts back up.There are already known recalls for two of issues noted above.

When traveling on the interstate at 75 MPH the trim at the top of the grill broke free, hit the windshield and blew over the vehicle. The front of the grill you can visibly see where the metal clips fail and were completely sheered off. GM Authority has a bulletin published on 11/1/2024 citing other incidents of 2022 GMC Sierra AT4 owners who have had the same situation happen to them.

Without warning, the motor siezed and locked up on the interstate. It has been in the shop for 3 months and GM is giving me the run around on fixing it but the dealership has told me that this is a huge common issue and is happening to many other vehicles this year with this motor.