This is a cool device that integrates an iPod with a GM factory headunit. Allows the iPod to be hidden away and gives full control on the headunit and track select on the factory steering wheel controls.

Only works on 06-07 factory head units with XM feature. Mine was in the Monte carlo but this should work on other GM radios of the same era.

It is totally plug an play. Nothing to tap, no power wires to run.

For more research search for the model - ISGM571.

I have a near new iPod cable for it with a 30 pin connector. Also include an Aux connector for any other line level audio input.

Retail is around a hundred bucks I picked it up as an open box for $50 and am offering it to forum members for $20 plus shipping.