I have an extra USA-SPEC Ipod to Interface PA11-VETTE that I had in my 07 H2t. This allows you to hook up your IPOD, IPHONE to your hummer without changing your factory radio. I have the instructions on how to install and how to use the unit. I had this hooked to the XM receiver. There is a good youtube video on how to install and the installation only took me 15 mins. I have the unit, the adapter for the XM receiver, the IPOD connecter. Let me know if you want by sending me an email scoobeepsk@gmail.com

Cost is $50.00