This GMC Yukon underwent an over the air update in remote Wyoming and was almost undriveable due to steering problems and brake malfunction. Also engine and transmission problems. It has been awaiting repair, but I have been informed that no fix is available because of transmission defect. No parts available We were nearly stranded.

- Missoula, MT, USA

I own a 2021 GMC Yukon Denali that had TOTAL BRAKE FALIURE last Tuesday. I had it towed to a local GMC dealer and are repairing it under warranty. I was lucky to be on a back road when my brakes went out. I had no warning lights come on prior to hitting the brake pedal and was able to coast to a stop on the shoulder When I applied the brakes, the pedal went to the floor and did nothing. You can't stop the car with the parking brake because it is electric. My concern is what if I was on a busy road when this happened or what if this happens to a family in traffic they could be seriously hurt or worse yet killed. I do have good photos of my instrument panel with all of the warning lights coming on after I tried to stop. In good conscience feel that I have to at least try and report this to GM, the state and anyone else that will listen. If nothing comes of this at least I tried and just hope no one gets hurt if this happens again. My wife refuses to ride in that vehicle until I have solid answers. The dealer said they will have my car repaired this week and are replacing the master cylinder and ECS This is fine but why did it happen and how can I be sure it won't happen again? I believe in GM and have a 2023 Yukon Denali on order. I would hope that after 3 years of this model they have most of the little quirks worked out. A rep from GM did contact me and at first was talking about buying my car back but changed that today. My case number is 9-8497380349. The problem is I have no idea when my new car is coming in our should I just cancel it and find something else. In my opinion this is a very serious problem.

- Washington Twp, MI, USA

On Friday October 22, 2021 around 7:20am as I was driving my children to school I was driving around 40 mph when suddenly I received an alert on the dashboard saying -??brake system fail-??, I then proceeded to brake to make sure my breaks were working when I noticed they did not work. I then started pumping the gas pedal repeatedly to make the vehicle stop. My car was not stopping and my children and I panicked and started crying. As I was getting closer to a vehicle and ready to crash I swerved the vehicle to the right where it was just an empty lot. I continue to press and pump the brakes until the vehicle came to a complete stop. I took pictures of the dash board once the vehicle was completely off. My Vehicle was towed to my house shortly after. I refuse to drive that vehicle after the terrible experience that jeopardize the life of my children and myself. We have suffered emotional distress.

- Fresno , CA, USA

Travelling down the highway 69 mph with my wife and three small children when the dash flashed multiple error codes, engine speed limited to 62 mph, and brakes essentially went out. Was able to get safely stopped. Contacted dealership and they advised shutting it off for 20 min and it would "reset". it did not reset and we refused to drive it in such unsafe circumstances without adequate brake function etc. GMC roadside assistance came and towed it away. Could have resulted in much worse outcomes and we are thankful no one was injured. Very nervous to drive it again after we get it back, not knowing if it will malfunction again.

- Stuart, NE, USA

Driving approx. 62 mph on a highway, went to slow down and unable to brake, upon pushing down on the break there was resistance, after pumping the breaks multiple times I was eventually able to slow down with a lot of force. Messages on dashboard read "brake system failure" "62 max speed ESC, service ESC, service trailer break system, and forward collision system unavailable." ABS, ESC and check engine light all illuminated on dash screen.

- Lillington, NC, USA