2021 GMC YUKON XL Complaints

Driving on a highway at 70 MPH then vehicle shut off / lost all power (with my kids in the car!!). Luckily we made it across three lanes of traffic to the shoulder. Got the vehicle to the dealership where they said they found large amounts of metal shavings in my engine. The engine was replaced but I am still nervous when office that it could happen again. I’m in a Facebook group where people are continually reporting the same thing happening to them. I bought this large vehicle to transport my kids and this is an extreme safety hazard (not only for us but those driving around us). This happened when I only had approximately 18,000 miles on the vehicle. Pretty much still brand new. Since then, I recently had to have the belt replaced again and the rear differentials flushed for loud grinding noises.

We purchased our 2021 GMC Yukon used from a dealership 1 year ago with zero issues. 3 days ago out of no where there is a very loud squeaking sound in the front under the hood. No engine or warning lights just the sound. We had a mechanic check it and a part inside the tansmission is broke. NOT fixable, MUST be replaced.......

Our family of 6 were traveling home on the Freeway, from a family road trip going about 75 mph. The engine revved up and then the entire car all electronics went black. And then flashed back on. A warning told me to "Start Engine" I attempted to, and it would not turn over. I was able to get to the shoulder to get us out of the hi-speed traffic. I put our hazards on, and the "Start Engine" warning popped up again. I attempted to start the engine again and it wouldn't turn over. All the warnings started to flash things like "check transmission, check battery.." etc. We asked our kids to stay buckled, because of the hi-speed traffic, and that it was dark outside, and we were in more of rural area. We called the nearest tow company, and had to wait about 30-40 minutes for him to get to us. The tow truck operator was not able to get the car in neutral to be able to get the Yukon on to the tow truck, he eventually got it on. The next morning the Service Tech called and said the car was completely dead when he got to it. Then, he called me later in the day and said he was able to look at the vehicle and run diagnostics and said the engine had seized. My car is less than 4 years old and had 66k miles. I had it serviced right before our family road trip at 64k miles. We have been the only owners and have always serviced it through GMC Service Centers Only. *Note*We had complained multiple times of a squeaking/chirping noise coming from the engine. Since we first received it. The service center kept the vehicle a couple of times overnight to try and diagnose. We had to pay for a new belt replacement, and the squeaking/chirping noise was never resolved. We wonder if this was a preexisting issue.

My wife was driving down the road with my Daughter and the engine simply stopped running without warning. She was able to coast to a stop on the side of the road and engage her hazard lights. When she tried to restart the engine it just cranked but never started. We had it towed to a mechanic and the mechanic told us that the engine is seized and we likely need a new engine, total cost of over $20,000. This vehicle should not be having this type of issue at 70,000 miles. If they were on a busy highway in the middle of rush hour it would have been a very dangerous situation.

Car shutdown and shifted on its own down to neutral from drive. Was driving on highway. Never was able to shift to another gear after pulling over. Computer board was completely blank. Engine would never restart. This is the second engine to go out in this vehicle.

On [XXX] while driving my 2021 GMC Yukon Denali to work, the vehicle suddenly lost power without warning. I had it towed to the dealership, where I was informed that the fuse pack needed replacement. Less than 36 hours after getting my vehicle back, I experienced another critical failure—while driving, the traction control light and check engine light came on, and the engine began making a loud clacking noise. Upon returning it to the dealership, I was told that the vehicle required a complete engine replacement. Prior to this incident, my Yukon had no known mechanical issues. However, despite the vehicle being only three years old and under GMC’s 5-year/60,000-mile PowerTrain warranty, the failure occurred at 65,722 miles—just over the coverage limit. GMC has acknowledged nearly 900,000 reported issues related to this engine defect, yet instead of issuing a full recall, I was only offered 60% coverage, leaving me with over $5,000 in out-of-pocket costs for an issue that is clearly a widespread manufacturing defect. I purchased this vehicle for its reputation of reliability and safety, especially as the primary mode of transportation for my family of five, with no nearby relatives to rely on. Given the known defects, it is unacceptable that GMC has failed to take full responsibility. I am formally requesting that GMC cover the full cost of the engine replacement and issue a recall to prevent other consumers from experiencing the same failure. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Car shakes in drive, car shakes when accelerating, transmission issues, rear differential had to be replaced.

I was driving down the highway when the engine started making a very loud rattling noise. I was able to almost get out of the travel lane. The engine does not restart and is seized. The temperature was 10°f and the closest two was 3 hours away and the vehicle was partially blocking the 2 lane highway on the right side. Unknown inspection status by manufacturer. There was no warning light at any time even after the shutdown. The symptom of the intense loud rattling occurred approximately 60 seconds before complete failure. Just enough time to get to a pull out off a bridge.

The contact owns a 2021 GMC Yukon. The contact stated that while driving at an undisclosed speed, the transmission warning light illuminated. The vehicle was taken to a local dealer where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired and remained at the local dealer for further investigation. Upon further investigation, the contact related the failure to NHTSA Campaign Number: 24V839000 (Power Train); however, the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 63,000.

On or about September 28 while traveling N on US 67 it was necessary to stop at a construction stop light. As I started to accelerate a pinging started. I continued roughly 10 miles, to my daughters house. The truck was flat bedded back to Jones Auto Center in Monmouth Ill. The found a bent push rod and bad lifter in the #1 Cyl. Repairs were done per the attached Invoice. Milage was 103,000. On 11/5/2024 while traveling on US 116 @ 65+-MPH the engine froze, with instant stoppage. Flatbedded to Myler Automotive where the engine was replaced per the attached Invoices. Milage was 105907.