Product Code: XMD-GMK Price: Check Latest   XM Direct™ Satellite Radio Package Allows you to play XM through your XM-ready GM factory stereo Does this work with my car?-Click Here-OEM Applicatons The XM Direct package includes everything that's necessary for you to play XM over your compatible factory stereo: an XM tuner box, a roof-mount antenna, and the adapter cable that connects the tuner to your stereo. The tuner box is compact, so you can mount it easily in a convenient spot behind the dash. The adapter cable connects to the tuner at one end, and your factory stereo at the other, providing both signal to the stereo and power to the tuner. Details:       XM Direct adapter package includes XM tuner, factory-system adapter cable and box, and roof-mount XM antenna     works with compatible, XM-ready GM factory stereos     audio cables included     tuner dimensions: 3-13/16"W x 4-3/8"H x 1-3/8"H     antenna cable length: 19-3/4"     adapter box dimensions: 3-1/8"W x 3-5/8"H x 1-1/8"D     adapter cable length: 16" Note: this system will not work with your factory stereo if your vehicle has a factory navigation system installed.