The volume sometimes will stay low even when turned up and sometimes it plays normal
It might have something to do with the OnStar button, my radio did that for a while until I reached up push the OnStar button and told it over the microphone clear or end, after that my radio volume came back up and worked fine, when you use the OnStar it drops the radio volume so you can hear The OnStar operator or recording coming through your speakers, sometimes it sticks, Try using the OnStar button and then say end
Could be that the potentiometer is not tracking properly. If that is not it, then it is the chip that controls the volume at fault.
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