just make sure that when you plug the wire that connects the siruius tuner to your head unit you plug it into the right one. On my pionneer, there where 2 plugs, and IN and an OUT,( there is an extra plug for plugging other add ons like the ipod interface or a changer) I plugged it into the in and the tuner would work but had no sound. after a half hour on the phone with sirius I figured it out
