U have hooked one up in my dads sclade, its an '04 non touch OEM nav unti, and it plays on XM1 but XM try's playing over it, can someone post a link on here where to bypass that problem? Or pictures of where to plug into on the XM reciever, I don't know where it is behind the glovebox. Its a USA Spec PA11-gm or something like that. Please help, Thanks