I consider myself pretty savy with electronics installation as I used to compete in car stereo competions. But I purchased an isimple IPOD adaptor and it seams pretty simple. You just unplug the two black connectors on the back of the radio, plug them into the harness of the isimple unit and plut the two male plugs of the harness into the radio. The Ipod cable plugs into the isimple unit. According the directions all you have to do is go into XM, back out and back into xm to access the Ipod. I have an '08 acadia with nav & XM, but all I get when I select XM is the display of XM1 and busy. What did anybody else have to do to make the isimple work?