2020 Sierra Infotainment Screen Won't Load - Frozen on GMC logo during startup

[roccod787]

2020 GMC Sierra Elevation: I had my battery unplugged yesterday for about 3 hours, and upon reconnecting, the infotainment screen won't finishing booting up, and is frozen on the GMC logo. Has anyone else experienced this before? I called the dealer, and they said it may come back on after driving for a while (but wasn't able to tell me how long) and said it also may require me to bring it in for service. That doesn't seem right; people change car batteries all the time, and shouldn't require a $200 service charge to reboot the screen. Does anyone have any tricks to get this radio to turn back on? I have had my battery unplugged before (although never for this long) and didn't have this issue. I also noticed the screen stays on/frozen even after shutting off the car, exiting, and locking, for about 3-5 minutes (which is also a new problem obviously related). Thanks for the help!

[gemarsh]

Have you tried unhooking the battery again for 10 minutes? 

[repairman54]

And when reattaching the cables put them on hard, direct. Don't let the connection spark multiple times as that creates spikes in the system confusing modules.