I just installed a Garmin GVN 53 GPS unit in an 2007 Infiniti G35 Sedan. It is wired in through the AUX function in the sound system so I can not listen to the radio when using the GPS. I have to toggle back to the Radio function to listen to my Sirius radio. I was hoping there is a way to wire the GVN so it would work while in the Radio mode. The radio would be on with the GPS in the screen.
The GVN comes with a XM radio function but I do not know if it could work with Sirius.

Does anybody know of a way to make this work?

 

^ that's what I was curious about as well.