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2020GMCAT4

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  • Name
    Jim
  • Location
    Denver
  • Drives
    2002 GMC Sierra AT4 6.2L

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  1. 2020GMCAT4
    2020GMCAT4 joined the community
  2. 2020GMCAT4
    I have a 2020 GMC AT4 and like all are saying above this is happening to me. Same symptoms. I turned off the Bluetooth and WiFi (disconnected my phone) and it stops turning the volume down. As soon as I connect to the infotainment system, my volume goes to zero and it doesn’t matter if i turn it up, it just turns it back down. Not just one time, either. I’ve tried all the remedies mentioned above. All the settings. It’s the pickup doing it - not the phone.
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