Just took delivery of a 2021 2500 HD All Star Edition and the infotainment system just quit on me. I checked the fuses and they were good so I scheduled an appointment to bring it in. Then it came back up fine the next time I started the truck. Now I see that these systems have been causing problems for years and there is a class action lawsuit on the 7" screen....but the 2021 LT has the 8" screen.