Well I have joined the crowd with Brake issues. Just purchased 2020 Trail Boss LT yesterday and left it at the Dealer yesterday. Have Service Brake Assist and Engine light. Drove back to dealer and they said they forgot to reset fault after software load, good to go. I also drove the truck 40 miles before warning came on. So forgetting to reset fault is BS. Well I made it 2 1/2 mile and the warning returned , back to Dealer and they gave me another new truck as a loaner it has acted good so far. No news today from Dealer.
GM needs to fess up and fix these issues!!!!
The waiting game begins.