I had the truck flat bedded to thr local dealer. Transmission cooling lines had failed and were replaced. They also flushed the transmission but didn’t finf anything on concern. I've had the truck back for a couple of months. No further transmission issues
Finally got a reimbursement check from GM to cover the cost of the rental car and the hotel after the truck left me stranded. Didn't cover everything but came close, just took a long time to process
