2023 GMC Yukon XL electrical system problems

“At around 7pm on Sunday October 18th I was driving on an interstate at about 80mph in the far left lane (of 3 Lanes) when, without any warning whatsoever, the engine power completely shutoff and the car went into neutral. The dash screen said to start the engine due to no power or low battery. I hit the start button and all the lights including all controls, blinkers, dash lights shut off. So with no blinkers, no lights, no power brakes, no power steering we were coasting in the fast lane of a usually unsafe stretch of an interstate at night. Luckily, I was able to navigate without any power to the right shoulder (lucky this was a stretch that had a shoulder) and coast to a stop. I had my wife and 4 kids in the car with me. The car was dead and said the engine battery was low. When the engine start button was pushed nothing happened, car was dead with no heat. We called onstar and requested a tow and were able to order a Lyft ride for my wife and 4 kids. The Lyft driver came to pick them up on the adjacent frontage road and they had to run across the grass median to get into that car, there was no other option to get them off of the unsafe shoulder. I stayed…”

“I was Driving down the interstate when the RPMS on my car increased and my car started to shutter. I went to get off the roadway and it put itself into neutral and lowered my speed. when i got On the shoulder it stalled and would not turn back on. I had To be towed. To this point, my car has been in the shop for over a week with no solution.”

“Engine shut off with no warning, all electronics disabled and couldn't shift out of park. Was driving down the road at approximately 50mph, Yukon shifted itself into neutral. Vehicle previously complied with the 25V-274 recall and passed, was operating on the new oil that GM recommended.”

“The car just died while going 55mph on the highway. Complete shutdown but luckily both the steering and brakes worked. After stopping it wouldn’t start again. I had my three children in the car aged [XXX], [XXX], and [XXX]. It was a horrific experience. GMC did some repairs to the engine that took over two months and then the car had a few more warnings pop up just a few weeks later. GMC now says there is a misfiring in one of the positions. I’m terrified of driving this car with my children as I don’t know when it will shut off again and how bad it will be!”

“While driving about 70 mph in the express lanes, the vehicle suddenly lost power and drifted like it went into neutral. There were no warning symbols. The vehicle could not restart even while coasting. After stopping, it locked itself in park and would not shift out of park. My family and I were trapped on the express lanes for over an hour in a dangerous location. The vehicle stayed stuck in park even on the tow truck. The dealer confirmed metal in the oil filter, a blown main fuse, and knocking when starting. The recall inspection and remedy were already done, but the failure still happened. The vehicle is undriveable and the required recall repair cannot be completed because the replacement engine is on backorder with no ETA.”

“I own a 2023 GMC Yukon Denali. In Nov. 2023, at about 4,000 miles, the vehicle suffered a complete engine and electrical failure at highway speed while I was traveling with my husband and three small children. It suddenly lost all power in the fast lane, including acceleration and engine function. Steering became extremely heavy, consistent with loss of power steering assist, and the electronics shut down. We had to guide the vehicle across traffic while coasting downhill to the shoulder beyond a guardrail. Traffic had to avoid us, creating a serious safety hazard. The vehicle would not restart. The vehicle was towed and required a complete engine replacement under warranty. After that replacement, additional issues followed. There was an HVAC/defrost concern. In June 2025, the vehicle again became inoperable without warning while parked at a store. It would not start despite repeated attempts, including by a dealership representative. A diagnostic scan produced over a page of error codes, but the dealership could not identify a cause and stated the vehicle was safe. In Dec. 2025, the vehicle engine was inspected under a recall and I was told there were no…”