Black_Mx wrote:You don't need to have xm for it to work you only need the satelite harness to plug into.
Correct, which cars that don't have satelite radio won't have (otherwise I would have bought a satelite tuner for $300 or whatever it is along with the USA spec). I looked in my car before I bought the USA spec to make sure I was buying the right now. Non-Satelite cars do not have the tuner (obviously) OR the harness.
Unless you physically have the satelite tuner from the factory, you probably do NOT have the harness.