Radio won't play in 1999 Cadillac Catera?

If the radio in your 1999 Cadillac Catera won't play, there could be several issues at play. First, check the fuse to ensure it's not blown, as a faulty fuse can cut power to the radio. Additionally, make sure the radio is properly connected and that there are no loose wires. If those steps don't resolve the issue, it may be a problem with the radio unit itself, requiring repair or replacement.