Model # of delco/cd player for 1997 Chevy

Hello all,

I am looking for the correct Model # of the stereo/cd player with the volume that goes up and down according the speed of the pickup. I drive a 1997 chevy silverado 4x4. My radio lights and cd player no longer works. Where else besides the dealer can you get this information. Every time I think about calling the dealer, they are closed!!

thanks

Oops, posted in the wrong forum. Sorry,