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2013 GMC Radio or head unit issues

HollyW
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HollyW New Member

HollyW

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My head unit has been nuts! The radio will be on full volume when I turn it on…every time now. The back up camera lines appear then disappear, the Denali home screen will come on and I can’t see the radio screen and more. It just started out of the blue. How do I fix this?

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