I went on vacation, and when I came back the car was dead in the driveway. I had to push the car out backwards to get it jumped. After I jumped it, it started doing wierd things and eventually everything started to work again (voltage problem, i'm guessing.) The only thing is, the radio doesn't turn on at all. Not even the clock. No "theftlock" or "locked" symbol on the radio either. Fuse is good, any other ideas?

 

Could it be locked
my friend had a similar problem on his VW and there was some code he needed to get from a dealer to unlock it.

 

I dont think the factory cobalt radios lock, I have removed mine now a couple times and it works fine when i hookeed it back up, You may have fried it.