Add me to the list of people waiting on a transmission valve body. My 2019 Denali 6.2/10spd that I have had since new was completely fine when I parked it in the garage. The next day it had only one gear. Less than 25k miles on it in 5 years. Been sitting at the dealership for a month. Happened a few days before the 5-year warranty expired, so I'm in a loaner at the expense of GM/dealer but I sure do want mine back. It's been there for about a month now. They claim I'm one of 4 or 5 people waiting on the part and they have no idea when they will get some.