2020 Sierra Infotainment Freezing and Restarting

ClearTheCode guidance (Gmc · Electrical & electronics)

Summary: For 2020 Sierra Infotainment Freezing and Restarting, work through these steps on your 2016+ vehicle:

1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
5. Test the common fix — follow model-specific service procedures; one change at a time.
6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: My 2020 GMC Sierra 1500 Denali has been having issues with the infotainment system. It frequently freezes, becomes unresponsive, and sometimes restarts itself while I'm driving. This happens with both Apple CarPlay and the native system.

I've tried soft resets by holding the power button, but the problem keeps coming back. It's really frustrating, especially when using navigation. Has anyone else…

This is educational guidance, not a substitute for hands-on diagnosis.