Audio Systems: 2003 Suburban 6 disc head unit non-bose, Suburban ipod, suburban aux

Question
I have an 03 Suburban with a in dash 6-disc changer, non-Bose I believe.  It does not have a cassette accessory.  However, I see that there is an AUX button on the front of the head unit.  Also, there is a open plug in the back of the head unit.  Is there a wiring harness available that would allow me to connect to an ipod?

Answer
Yes there is  it is a auxiliary audio input for GM vehicles  it will work n the suburban radio

http://www.oemautosound.com/pc-296-83-pie-gm12-auxv2-chevrolet-2002-2007-auxilia

and this is the ipod interface, full ipod controls from suburban radio and steering wheel controls

good luck