Actually the ebay link has instructions on what to do if you don't have XM.........too complicated for me plus it's only a lease, too chicken to mess something up.... guess I'll have to settle with a FM transmitter and get lousy sound quality... oh well, wish the 2006 Hummer H3's Navigation Systems had an AUX port.
Thanks alot for the responses
oh here is the link
http://cgi.ebay.com/ws/eBayISAPI.dll...keT rack=true