2007 new body 2500 silverado. i got a xm, navigation system part# 25797978 to put in the truck.hooked it up radio, xm, dvd work great but it has no idea where it is. on the back i have a small blue port and 2 other inch long ports that i have no other wires in the truck to hook up to it. what parts do i need and the part #s would be great. thanks

 

Hi
You probably have answer by now but check in forum under nav install 2007 tahoe.

 

Mine came with the single disk CD/DVD/MP3, bought HU#25797978 off ebay, installed antenna and HU. Have found several threads talking about install, plus the vss connector and tieing into the onstar, which I haven't done yet, (did find it on ebay and purchased). Did you have any major problems at the dealer?

 

Did you install a GPS antenna?