[Jesse]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by kodiakz:
I am not familiar with that pac piece--does it allow for switching of 2 separate video inputs? If not, easy to just add a switch. I will call viz tomorrow and see if I can get a schematic for you. </div></BLOCKQUOTE>

The PAC VCI-GM2 will bring video to the touch nav screen. They also make an adapter for the 1st generation NAV screens (VCI-GM1). There are two video inputs - one for rear camera - it will auto switch to the camera any time the truck is in reverse. The 2nd input can be activated with a switch. I will let everyone know how it works once I get it all setup.

I hope to add video to the nav screen, backup camera, extra inputs for the rear dvd entertainment, IPOD adapter with touch screen control on the factory nav unit, hands free bluetooth cell phone adapter that will auto-mute the system and use the onstar speaker system.

I want to do this all without any visable changes to the factory setup. Once I get it all working I will be happy to let everyone know the results.

I really appreciate everyone's help so far. I know I am at least heading in the right direction.