2021 GMC YUKON XL Electrical System Problems

I was driving from New Orleans with my family when traveling at 75 mph when it’s like the transmission started straining and the engine was losing power/pressure it’s like the engine or transmission was struggling I’m not sure what was causing it but it was a scary experience knowing I’d my kids and my wife with me and we were out in the middle of nowhere.

Rear view camera fails to display on screen when vehicle is shifted to reverse. Failure remains during the remainder of ignition on cycle. The failures does not generate system error codes. Dealer service unable to diagnose failure

The contact owns a 2021 GMC Yukon Denali XL. The contact stated that during rainy weather, rainwater leaked into the vehicle through the drainage hose, causing an electrical short. The vehicle was taken to a dealer where it was confirmed that the drainage hose and wiring needed to be replaced. The vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 55,000.

The suv shown safety message, it was diagnosed with airbag not deployed. This is very important specially for the rear backseat. GMC doesn’t want to be responsible and makes customer pay.

Large fire started at rear of car. Car was parked on driveway and no one was inside. Noticed a burning smell before fire started. Could not locate any smoke. Vehicle rear burst into flames 20 minutes later. Fire department responded quickly and was able to put out the fire before it reached the house. Vehicle is totaled. Vehicle was inspected by fire department and police after fire was extinguished. They believe the fire was electrical. Vehicle is currently being inspected by insurance company. No warning lamps or messages appeared. Rear windshield wiper stopped working 2 weeks prior to fire.

The vehicle had a total failure of its rear safety package which includes blind spot monitoring, rear cross traffic alert, rear parking sensors and rear safety alert. The warning illuminated on the dash that all of these functions were offline and service was needed. We took the Yukon to a GM dealer and they replaced a computer and had a hard time getting it to program. This failure also affected the HVAC system in the car, with the fan staying on high. After 23 days of service, the dealer thought they fixed it. After two weeks of having the vehicle back the same alert came on 5-6 times in the same day, with another safety package failure. Now the alert doesn’t come on but none of those safety features work, they are all offline. It is bad enough driving a 20’ long vehicle without the safety package working, but now...

I was driving 30 mph when the car went into neutral and rolled to a stop. When I put on the brakes the engine shut off and it went into park. It would not restart or shift out of park . I was stuck in an active busy road. The car was towed to the dealer. They said it was a problem with the BCM. GMC had put out a bullletin which was to reprogram the BCM. My concern is that if this had happened on a busy interstate in traffic at highway speeds the results could have been fatal.