Ok I have a 2001 C5 with the Bose System. I did change the head unit to a after market pioneer. The battery on my car was no good..so we got a new battery. Since then my head unit works fine...but something went wrong with the speakers. When I turn on the subwoofer switch (the head unit has this feature) all the speakers work including the bose sub in the back. But all I'm getting is Bass..no highs but when I turn the sub switch off I get 100% no sound. I checked the fuse..fine..i messed with the settings on the radio.nothing...im not sure what is the issue with this thing but riding in silence is not cool.. especially when you have a toddler in the car..GOD!!!!



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