What 145 owners told NHTSA about the 2024 GMC Yukon Denali

As I was driving the automatic emergency brakes went off and stopped me so hard and fast that I feel like I got whiplash. The seatbelt yanked me backwards, smacking my head against the headrest, I have an instant headache from it and my neck and shoulder still hurt 20 minutes later. It scared me and my child half to death, my heart was pounding and I could have been rear ended. I was driving about 40mph and was in no way in any harm/needing to break (specially this hard) for anything when this happened. This is not the first time my car has unnecessarily automatically slowed down quickly but this is the first time it’s ever been this abrupt and severe. I will be taking my car to be inspected for this issue and if my neck and shoulder still hurt in the next day or two, I will also be going to the doctor about the incident.

NHTSA ODI 11749056

Start transmission was replaced by dealer at 75 miles. 2nd transmission was replaced at 175 miles transmission was humming and slipped at around 30 to35 mph this was around April of 2024 August 1 2025 while driving at 45 dash board lit up went flashing and suv slowed dramatically down to 30 mph Got to dealership and they kept the vehicle for about a week and returned it with it being supposedly fixed. About mid October while driving at 60 mph it shut down again almost causing a wreck went to 30 miles per hour again. Hurt my wife’s neck when it reduced speed so quickly. Took back to dealership and I told them this car is dangerous this was with about 20 k miles Been in shop was told it is scanning with 22 repair codes we have not had the car for 5 weeks and are trying to work with gm and dealer to get us out of it. But as of this report no progress. On interstate in city traffic this car will hurt or kill many people. I’m refusing to let my family or myself drive it. There is no warning when it will flash lights in dash and reduce speed. Also the front crash sensors went out and are currently not working we have all service records and paperwork that has been done including maintenance records We were given vehicle back with no warnings. I went to Nita’s and ran vin and it still shows issues. We are still making payments but driving a loaner car. The car is dangerous. I advised the dealer the first time it happened. I didn’t want it back. My wife went and got it and it sis it the second time and now she agrees it is dangerous contacted GM and they want to fix it but dealer implies they can’t ?..

NHTSA ODI 11700720

The contact's wife owns a 2024 GMC Yukon. The contact stated that while driving at 80 MPH, several warning lights flashed on the instrument panel as the engine shut off. The vehicle's speed abruptly decelerated as the contact was nearly hit by an 18-wheeler traveling close behind the vehicle. The contact managed to coast the vehicle as best as possible off to the shoulder of the highway. The vehicle was towed to a dealer and a diagnostic was performed which showed that the engine had failed. The contact stated that both he and his son suffered emotional trauma as a result of the sudden failure; however, neither has yet to seek medical treatment. The manufacturer was notified of the failure and the contact was offered a new engine despite the contact's request for a vehicle buyback. The contact stated that he did not feel safe driving the vehicle and feared for both his and his family's life as a result of the failure. The vehicle remained in the possession of the dealer and was not repaired. The failure mileage was approximately 22,000. The VIN was not available.

NHTSA ODI 11648120