2007 hummer h3 vss hookup

I'm trying to install an AVIC-D3 head unit (DVD/Nav) and the last connection I need is the VSS.  I've read several posts regarding the VSS wiring for an '06 H3, but none of the connectors I have seem to match the colors/descriptions for that year.  Would GM change the wiring colors and locations for 2007?  I've tried the BCM (passenger kick panel), 2nd radio connector, and instrument cluster plug...but each time I either don't have a wire in the location specified for 2006, or there is no wire that color (GREEN / WHITE).  Can someone help to verify where I can connect to the VSS for an '07 model?

Thanks

Has anyone done an aftermarket NAV install on a 2007 H3?  Just to add more details to my original post:

Connector C2 (12-pin) at the back of the radio does not have any wires in terminals A-E, although the factory radio I pulled out does have auto volume control (The only option I had for sound was the XM tuner, other than that it is a base radio setup).

I looked at the back of the instrument cluster, and there is an 18pin connector there. but no dark grn/wht wire.

What kind of signal does the VSS carry (DC, AC, resistance)? 

I'd really like to get this thing completely hooked up, so any help would be greatly appreciated.