Audio Systems: Truck cassette player, auxiliary input adapter, radio tape

Question
I've been trying to get my cassette player in my '97 Sonoma to play my Ipod through an adapter, but for some reason it won't even play tapes. If you could help me I will be most thankful.

Answer
the radio tape was made to play tapes only not electronics devices that will damage the radio
if you have a 9 pin plug in the back of the radio you can use this auxiliary audio input

http://www.oemautosound.com/pc-303-87-pie-gm9-aux-gmc-1995-2002-auxiliary-input-...