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2022 HD High Country 8 inch Infotainment System No Sound

Tom Brizzi
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Tom Brizzi New Member

Tom Brizzi

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For several weeks I have been searching the internet for posts and videos on how to correct/reset this version of GM's Infotainment.  Typically, everynight, or when the truck sits for 8+? hours, when I start the truck everything is fine.  I get the start up chimes, I get blinker sounds and the radio/bluetooth/CarPlay (both wired and wireless) produce sound.  However during the day, sometimes as quickly as after my first 5 minute trip, once I shut the truck off and get back in, I have no sound for the rest of the day.

 

I have checked the 2 passenger side fuses (INFO1 and INFO2), and the drivers side AMP fuse and they are fine (if they weren't, it could not repair itself every night).  I have disconnected both batteries (Duramax Dual Batteries) negative terminal for 10 minutes to try and reset the system.  I have tried things meant for newer Infotainment systems (Holding the hangup/mute button on steering wheel for 20 seconds (no reboot)) and gone through settings looking for "Start in Safe Mode" (does not exist in 8 inch system).  In settings, I have reset to factory setup (losing the 4 trailer dimensions I painfully entered for the trailer towing package) as well as deleted my CarPlay phone connection and set that back up.

 

Why every evening can this system repair itself, but quickly into my stops each day, I lose all audio for the remainder of the day.  I hate to take it to the dealer and pay $200+ for them to diagnose.  Hopefullyl someone knows of another or the correct way to "reset" this version of GM's infotainment system.  Thanks!

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