Welcome to AF ladyphenom7 !!
Yeah these bulbs do burn out, I think I have a R&R for this, or at least the bulb # if that's what's out. I'll check.....
These radios are also known for thier displays to just crap out. Especialy when it gets hot out, or with the heater on high, Cold weather they seem to function right.
Edit>>
Ok the bulb is GM/AC Delco part #16208443, cost between $8-10- ouch!
Here is a pic of the bulb too.
