I have a 99 Tahoe with the stock radio in it (CD/Tape/Tuner). Unfortunately, the CD player seems to be shot, keeps giving me an error message that amounts to the thing is dirty, so it cant read the disc. I've tried cleaning it, and it didnt help. I just dropped a lot on a fuel pump and alternator, so I'm holding off any "optional" expenses for a while (such as a new stereo) Any ideas ?