Stuck CDs
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Interrupting the battery power by pulling the fuse will sometimes release a stuck CD. If a CD is stuck and removed, inspect it for warps, cracks, etc. If the CD is damaged, do not replace the radio.