2023 GMC SIERRA 1500 Wheels Problems

At 12,018 miles on my 2024 gmc sierra 1500 I experienced a rear wheel lock up. I have 4wheel drive capability but I had the truck in rear wheel drive only. Thankfully I was not going fast at the time. I was going between 35-45 mph when experiencing the lock up. As I was going down a straight away, I experienced a rear wheel lock up of my 10L80 transmission. My tires were squealing like crazy. I pulled off onto the side of the road. After shifting to reverse and then park and then drive the problem corrected itself. When I brought it into the dealership, they could not find anything wrong with it. Additionally my trucks software was up to date and not lacking any updates. I don’t drive this truck very far and only drive about 150 miles a week. A rear wheel lock up of this magnitude...

I was driving at approximately 25-30 MPH, accelerating from a stop light and I felt a clunk, heard a grinding noise and my back wheels locked up. It was snowy/icy conditions so the back end of my pick-up slid out to the right a little bit before the wheels unlocked and I was able to regain control. I could have slid off the road or into another vehicle had the wheels remained locked. The computer system then alerted me to a transmission issue and to reduce speed immediately and call for service. The pickup was then unable to shift out of 1st gear. The vehicle has been towed to a dealer and I have been informed the valve body in the transmission has to be replaced which is 8-12 weeks backorder.