2023 GMC Yukon Xl

On August 17th, 2026 while approaching a nature preserve entrance at approximately 1 mph, my 2023 GMC Yukon Denali Ultimate suddenly accelerated on its own, without the driver pressing the accelerator pedal, striking a split-rail fence and a tree. Airbags did not deploy. The front collision system didn't issue any alerts about the fence and tree. A GM software update had been installed a couple of days before this incident . In the weeks prior, the vehicle had also intermittently failed to hold side mirror position and periodically failed to deploy the power running boards. I request that GM and NHTSA investigate a possible link between the recent software update and an unintended acceleration event, potentially related to the adaptive cruise control or another driver-assist/body control module.

The contact owns a 2023 GMC Yukon. The contact stated that while driving at an undisclosed speed, the engine seized. No warning lights were illuminated. The vehicle was towed to the dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was repaired. The contact was informed that the repair was covered under an unknown recall repair. The vehicle was released back to the owner; however, the failure reoccurred. The contact stated that the vehicle was idling roughly and jerking abnormally. In addition, the contact stated that the drive to the residence was not a smooth drive. The vehicle was taken back to the dealer, where a technician performed a ride-along. The contact stated that the engine seized three times during the ride along. The contact was informed that the engine needed to be replaced a second time. The contact stated that when the vehicle was released, the rear bumper was damaged. Additionally, while attempting to start the vehicle, the Forward Collision Avoidance warning light was illuminated. The vehicle remained with the dealer. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 44,000.

The onstar module of my 2023 GMC Yukon has failed. This is a wide spread issue with recent model GMC's. There are thousands of reports of the same thing happenings. When an onstar module fails, the vehicle loses its safety features. No lane departure, no collision detection or pre-collision braking, no critical system checks. Even the gas and mileage components stop working correctly.

The contact owns a 2023 GMC Yukon XL. The contact stated that immediately after purchasing the vehicle, the battery failed and was replaced on two separate occasions. Additionally, while driving or reversing, the braking system erroneously activated, causing the vehicle to abruptly stop. During the failure, there were no other vehicles or large objects nearby to cause the Forward Collision Avoidance system to activate. The vehicle was taken to the local dealer on several occasions, but no failures were found. The vehicle was not repaired. The manufacturer had not yet been contacted. The failure mileage was 50.

Good afternoon. Our rental car we picked up from the Denver International Airport on [XXX] had numerous incidents of emergent braking at highway and non highway speeds which were reported to Sixt ( car rental) and documented on the dates in which they occurred, [XXX] (7-8 occurrences ) and [XXX] (3 occurrences-2 after a car wash). On the day in which the first occurrences happened, the car rental company representative from Sixt, 3way connected me with a mechanic from Annex who advised washing the vehicle to ensure the sensors were clean. I did proceed to wash the vehicle on 1.25.25. This same company, Annex Automotive, then evaluated the vehicle on 1.29.25 after emergency breaking occurrences continued of which [XXX] was the worst. On [XXX] there were no vehicles in front of or behind us nor to the sides of us and the roads were completely clear. It was also dark out. Attached you will find evaluation with validation there is a mechanical concern with the vehicle. On [XXX] the extremely unsafe occurrence of emergent braking occurred with skidding tires and the doors locking and unlocking at the same time occurred. This vehicle was completely unsafe to drive. I, as well as my passengers/family, are very lucky the road conditions were moderate on [XXX] and clear on [XXX], or these emergency Breaking issues could have caused a serious accident. There were a total of five of us in the vehicle when all of these occurred. I am from Minnesota and have a Yukon XL so I am comfortable with this vehicle This was the scariest vehicle experience I have ever encountered. The company did tow the vehicle on 1.29.25. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2023 GMC Yukon. The contact stated while the vehicle was parked, the vehicle shuddered. The "Service Traction Control" and the "Forward Collision System Unavailable" message was displayed on the instrument panel. The check engine warning light was illuminated. The failure occurred on several different occasions. The vehicle was taken to a dealer where it was diagnosed that the fuel injector needed to be replaced. The vehicle was repaired however, over time the failure still persisted. The vehicle was taken back to the dealer where it was diagnosed once again that the fuel injector needed to be replaced. The vehicle was repaired however, over time the failure still persisted. The vehicle was taken back to the dealer for the last time where it was diagnosed once again that the fuel injector needed to be replaced. The vehicle was repaired however, over time the failure still persisted. The manufacturer was notified of the failure. The failure mileage was unknown. 

When driving in a parking lot, due to the design of the cruise control set switch, it is very easy to unintentionally set the adaptive cruise control. Specifically, when maneuvering in a parking lot at low speeds (below 5mph) and allowing the wheel to return to center by spinning in your hands, the cruise control switch which is a dial/lever that sticks out beyond the surface of the wheel, catches on your hand and engages the cruise. This sets the cruise control target speed to a 15 MPH even if you are currently going slower than that. The vehicle then accelerates on its own at a fairly aggressive pace to get up to 15mph. You can of course hit the brakes and cancel the cruise control, but in a tight parking lot scenario this unintended acceleration could easily cause you to strike another vehicle, obstacle, or pedestrian. The cruise control on this vehicle is enabled by default on start up and the single action of hitting the set switch/dial engages the cruise and accelerates sharply even if you had not previously used cruise in that ignition cycle. This seems like a stupid design and dangerous, and would be very easy to fix with a software update to not let the cruise become enabled below 15mph. We did not have the dealer investigate because this appears to be the normal operation of the cruise control system. There were no unusual warning lamps. This has happened several times and also has happened to my wife while driving.

I recently purchased my vehicle and after already transporting my family of 5, including my newborn child for several days, I noticed that my parking sensors were not working and I began receiving a message of my dash that parking assist, rear braking and auto park assist were unavailable. I reached out to GM around 4/4 informing them of the issue and they said they didn't have any recalls or retrofits for my vehicle and advised me to take it to a dealer's service deparment to be reviewed. After having an issue with Simpson GMC of Buena Park of failing to even review my issue for a week, I took it to Penske GMC of Cerritos on 4/17 and they determined that during manufacturing of the vehicle, someone failed to connect the module that controls my parking sensors. They had to remove the front fascia of my vehicle to connect the module for everything to work correctly. This has forced me to call into question the quality control of GM vehicles and also concerns me that a car manufacturer would deliver a vehicle with such gross negligence where a consumer would not know the safety features they rely on to keep themselves and their family safe do not work. GM Customer Service also never followed up on my issue even after calling and emailing them several times, which again calls into question how General Motors operates their business.

While driving in a gravel driveway, the window curtain airbags and the middle console airbags deployed, with no collision what so ever causing injury to the driver and should you have a child this could have been very damaging as the airbags came out in all the way back through the vehicle. This incident was inspected by police and fire as OnStar called them as it detected a collision, and without the vehicle being moved from the location the officer said there is nothing that should have caused the airbags to deploy, there is absolutely nothing here in this driveway that could have possible caused airbag deployment, The running boards go in and out, even when on the interstate constantly, and when backing up or going forward at times, and especially in a gravel driveway your automatic breaks will stop you abruptly, so fast that your seat belt will lock up on your and thrust you forward and backwards. The rear entertainment system will screen at times when turning it on will stay black and you have to keep turning it on and off to get a screen to show. No warning lamps or messaging with any of these cases.