assume you have the nav and are running the sirius through the xm band on your factory radio. I belive there is only one input in the stock radio, and your sirius is probably using it. I was told that I would need to get some sort of adapor/thing???( like $350) to allow for the sirius, I-pod, and a back up camera to all run through the stock radio/nav.
This could be a total crock, but I have used these guys for several years and so far so good. Hope this helps. Oh and Welcome!
