I have an 05 Aveo Sedan that came with the stock AM/FM radio. I turned the car on the other day and the radio won't work. It's just a black screen and doesn't prompt me for a code or anything. The battery is fine, although I was having some problems with it about a month ago. I've tried changing the fuses without any luck and also tried entering some codes I found on this website. Still no luck. Any thoughts or suggestions would be appreciated. Thanks.