I keep getting this runaround about me having to install XM to my car... from what I have read, my car is already "set up?" for XM radio, and I even have a button that says XM/Aux on the dash. When I press this button I believe it says no device, and when I call Xm, they say go to dealer. Anybody have a 2006 Chevy Equinox LS and know about XM setup or just know anything about it?? YOUR HELP IS MUCH NEEDED, THANKS IN ADVANCE!!!