Radio is possesed
Simple issue to fix, or simpler to replace the beast with an aftermarket model (with an mp3 input)?
I know alot of guys prefer to keep the stock look which is completely understandable with the potential collectability of these cars but the stock Delco unit is not very good to say it nicely. A multitude of issues always seem to come up with them from the display lights going out, codes popping up and of course the internal electrical gremlins like what your experiencing.
Cheapest option is to replace with a used stock radio from another Camaro. Even an inexpensive aftermarket though, will have better overall sound though and most have usb or aux inputs for MP3/iPod players or usb stick for an endless playlist of your favorite music. These are installed with a harness and antenna adapter so if you ever wanted to put a stock radio back in you can because the harness is untouched. You just plug the adapters into it.

