I've seen people run wires down the heater vents before and mount the accessory (nav, sat radio, etc) to the dash just above the vent. That's tricky to get the wires to come out where you want them though.

 

The radio should have a SAT button or function if it is satellite radio ready. If no SAT button press the Band/Input selection button and cycle through the available play modes (FM, AM, CD, etc)

 

The satellite radio function if available may display an ESN (electronic serial number) You call Sirius with that number and they can activate it for you. If it doesn't show up on the display you can usually get it off the label on the head unit but that of course means removing the head unit. Perfect time to install your Tomtom and hide the wires.

So, is there a question somewhere in all of this?

Yes, there was a question yesterday. Where'd it go?!!

 

Anyway, nice answer Fairtax. (Even if we can't find the question!)

What in the...

 

I'm as confused as you guys are trust me.

the original poster must have deleted his post.??