GMC Hummer EV Pickup

My 2023 GMC Hummer EV 3X has experienced repeated thermal-protection failures in the high-voltage battery and drive-motor cooling system, causing the vehicle to enter limp mode and drop to as low as 12 mph without warning. Stored fault codes: P0C12, P0C13, P2EE0, P2EE1 (battery and drive-unit overheating). A sudden, unannounced drop to 12 mph in a 9,000-lb EV is a serious safety hazard — on highways it creates rear-end collision risk, in intersections it leaves the vehicle stranded in traffic,…

Visibility / Defogging / Defrosting issues are main safety concerns. Every winter for the last 3 years, the heater fails and blows only cold air. This is intermittent throughout the year, but recurring. With cold-weather driving conditions, it creates an unsafe driving experience when windshield and windows can't defog or defrost properly. The problem has been reported several times to the dealership and it was never fully resolved while under warranty. Each time I took the vehicle to the…

Severe recurring roof water intrusion on 2022 GMC HUMMER EV; repeated failed repairs; interior rust/corrosion; safety concerns in high‑voltage EV. Vehicle: 2022 GMC HUMMER EV Edition 1
VIN: [XXX] Current mileage: ~12,000 miles
 
My vehicle has a recurring defect involving severe water intrusion into the cabin through/around the removable roof panels/roof sealing areas during rain. Despite repeated dealership repair attempts, the vehicle continues to leak. The ongoing water intrusion has…

I was driving down the street and suddenly lost all motive Power, vehicle became difficult to control. I have a video. The car also made a grinding feeling and very loud whining noise

When it rains, within 24 hours, the windows do not automatically move down enough to open the door on command of pulling the door handle. This disallows the ability to close the door back if the door is open, barely underneath the lip of the sky panels. Because of this power loss, the mirrors do not open, the door locks do not work, and the windows do not work. To be able to re-close the doors, the sky panels must be removed and either left off or replaced. Essentially rain leaks into the body…

Same situation occurred twice. I was in the car at a red light. Car had been stopped for about a minute. Was on a slight decline, engine brake was engaged to hold car in position. Car was stationary completely. Suddenly tons of warning lights flash on the dash board 'One pedal driving unavailable', 'Service ESC', 'Service trailer brake system', 'Service active steering system', '4wd unavailable', service driver assist system , 'Speed limited to 36 mph'. First time this happened was June…

My hummer has been nothing short of a nightmare. Been towed in for service and delivered to the dealer for repair 10 times now and the result is continuously the same problems. Having no date on battery replacement and constant warnings on the dash has brought to the point of it being unsafe for me and my family to utilize. It was recently in the GMC shop at Marquardt GMC for three weeks displaying over a dozen codes of issues. Due to lack of training the dealership mechanics are attempting to…