My 2021 Silverado is having the same issue. This is the third spell. It will turn over and keep turning over. Won’t fire up. When parked for 20 mins or so it usually restarts fine. I have paid a ton of money for this truck and I expect it to start on time, every time. Can someone please post the solution so I can relay that information to my dealership, since they can’t seem to figure it out. Please and thanks.