2021 GMC YUKON Complaints

In July of 2024 while coming back from vacation pulling our boat our 2021 Yukon Denali with 6.2L motor started making noise while traveling on the interstate. I started to get over to the shoulder as the car lost power. I finally got it over to the shoulder as traffic was heavy and it was pouring down rain. As soon as I got it to the side of the road the check engine light came on and the engine died. It would not turn over or restart. After about 3 hours along side the very busy highway in bad weather GM finally sent a tow truck to take it to the dealer. After a week in a half it was finally diagnosed with spun rod bearings and main crankshaft bearings. The car had just over 21,000 miles and had been serviced per the manufactures recommendations. It took over 7 weeks for the car to be repaired where they replaced the engine with a remanufactured engine. We did not get a loaner car since it happened in KY and we live in IN. Our family had to find our own way home and a way to get our boat home also. We then had to find our own way back to get the vehicle once it was repaired. GM did reimburse us for a rental car at $44 a day only and they did not pay any taxes or fees only the rental rate. You cannot rent a similar sized vehicle for $44 dollars a day. We spent approx. $2K out of our own pocket for expenses related to this breakdown. The vehicle now has approx. 29,000 miles on it and we have not had any problems since we got it back

We were driving on the interstate outside of Chattanooga TN when our car went into neutral while we were in the left hand lane next to a 18 wheeler. My husband was driving and we have our four children and dog in the car. We lost acceleration. My husband was successful in getting us off the highway and onto the shoulder. The car started again and we tried to make it to the next exit when it went into neutral again and lost power. This was on [XXX]. We had it towed to the nearest dealer, Integrity Motors. They called us and said that it threw a rod and that the engine was broken and the whole engine would need to be replaced. After replacing the engine (it took 2 months) we picked the car up only to have the engine light come on. I took it to Autozone where they ran the codes and told me that the fuel injectors were bad and possibly the intake manifold gasket. I called Chattanooga and they told me that I should take it to the nearest GMC dealer. Parks GMC in Greenville inspected the car and we had to put in 8 fuel injectors. I have documentation of all of these issues. There was no warning light or any warning that our engine was about to shut down. We could have been in a serious wreck with the 18 wheeler with possible loss of life or injury. We have had significant financial loss. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Our 6.2L failed unexpectedly after regular maintenance. No warning, just the sound of knocking in the engine then loss of power and bad sounds from the engine. Stranded on side of road. GM wants to replace the entire engine without opening engine, claiming lower engine damage. Technicians say this is spun rod bearing problem that is very common. Dangerous and poor quality.

I was driving on the highway at about 70 miles an hour and my vehicle started to decelerate without warning, dash lights came on. I was able to safely get off to the side of the road. The vehicle would not start, so I had to call a tow truck. Once towed to the GMC dealership and looked at by mechanics, I was told the engine failed and I would need to replace it. I was also told there were metal shavings in the oil. My vehicle did this without any warnings. I never had the check engine light come on before this incident, nor were there any noises that would make me think something was wrong with my vehicle.

Engine failure of lifters and piston rings at 58000 miles. Engine failure at highway speeds causing complete loss of power on highway. It is completely unacceptable to have such catastrophic engine failure on such a new vehicle.

The contact owns a 2021 GMC Yukon. The contact stated while driving approximately 20 MPH, there was an abnormal sound coming from the vehicle while turning right or left. No warning light was illuminated. The vehicle was taken to an independent mechanic to be diagnosed; however, a diagnostic result was not provided. The independent mechanic made the contact aware of an undisclosed recall however, the VIN was not included. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 76,052.

While accelerating the vehicle began to make an audible liquid grinding sound and three error codes popped up, one after another. The engine light began to flash, however the vehicle kept moving. I limped roughly .5 mile to the closest service station where I subsequently had my vehicle towed to the dealership where it was purchased. Later notified the lifter and CAM failed. Mind you, this vehicle currently has 55,000 miles and has already had the transmission replaced at 45,000 miles due to metal flake in the transmission because of a faulty hose from GM. While I appreciate the dealership ordering a new engine for me, I do not feel safe driving this vehicle, and do not feel it should be resold to anyone given the MAJOR safety issues associated.

GMC currently has bulletin out on the issue and how to fix it. unfortunately this doesn't not fix it and I am going to have to replace my whole rear differential at only 60,500 miles. Gmc is well aware of the situation and has not done a recall. The fix the bulletin proposes would not work and there was over and inch of metal shaving found. This is a huge issue in the specific vehicle and the part to replace the rear differential isn't even available (national backorder with no ETA) leaving customers without a vehicle or solution for their faulty issues. GMC should be liable for their negligence and putting customers in potential harm if the vehicle is continued to be driven with a failing rear differential. The vehicle did not prompt any warning messages but the grinding sound was very loud. Bulletin No.: 21-NA-028 Date: January, 2023

Our 2021 GMC Yukon XL for the third time now has shifted from Drive to Neutral and then turned off on us on the highway. The first time GM changed the motor (at approximately 35,000 miles), the second time was about a month ago we were at the White Mountains and it shut off on a highway, the third time was yesterday [XXX] (with 61,057 miles), my wife and I were driving on [XXX] in Massachusetts and when I accelerated the vehicle shifted from Drive to Neutral and then shut off on me. This vehicle is not safe and on all of these three occasions I have been lucky not to be hit and have been the driver. I am a trained and professional driver and I must state that this vehicle is not safe at all. I need to find a solution to this with General Motors. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2021 GMC Yukon. The contact stated while driving 60 MPH, the message "Reduced Acceleration" was displayed, and the check engine warning light illuminated. The contact stated that the vehicle failed to exceed 40 MPH, and the vehicle was driven back to the residence. The vehicle was taken to BMI Automotive transmission shop, where the valve body and the intermittent speed sensor were replaced; however, the failure recurred while driving. The contact was able to drive to the residence. An unknown dealer was notified of the failure. The vehicle was in the process of being towed to the dealer. The vehicle was not yet repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 56,500.