radio on 2002 Cadillac DeVille

My radio just stopped working,what fuse do i need to replace or what do I need to do to fix it

Asked by for the 2002 Cadillac DeVille
There are two fuses in thew rear fuse box a 30 Amp fuse marked Audio Amp and another fuse marked Audio a 15 Amp fuse. Check these first.
thanks for the help