Most of the FM transmitters will work, but not reccomended if you can direct connect the unit to the headunit. If you go to
www.crutcfield.com you can get the GM aux input adapters. The sound quality is much much better than the fm transmitters... Here's a pic of one... Then simply use a 1/8th stereo mini to dual rca cable (about 5 bux) to connect your xm unit... (or switch to sirius...:P)
