2022 gmc sierra sle limited, 19000 miles. Same issue, no reverse, reduced speed mode. Need valve body replaced. Part on back order with no eta. Been sitting at dealer since June 26th. Dealer was able to give me a loaner after a month. What I understand is if a loaner isn’t available, dealer can arrange for third party rental. My concern is that I’m losing warranty and I don’t have use of my truck. Is gm going to start to extend warranties for the time that is being lost? Seems only fair to me, after all it’s no one’s fault but theirs.