I would try two things.
First, disconnect your battery for a minute or two and reconnect it. Then enter your radio code and see if that worked.
Second, check to see that everything is still plugged into the amp (under the passanger seat on a 97, not sure about other years) and check the back of the radio and the CD player.
If that doesn't work pitch it all and buy an aftermarket radio with all the features you have been dreaming of. Your 90 always feels better when you buy it a gift............
By the way, that was my 300th post. About a 1,000,000 to catch up with Mike H!