YESSSSS!
Guess what fellas, IT WORKS! This is way to cool!
Basically, 12v power and ground, composite low and high. 4 wires and I was able feed the image into my monitor. All those other wires are just GM fluff. I used a PC power supply to test.
I was doing some fun-with-thermal-camera stuff tonight like putting my hand on the wall and watching the prints fade, checking out the heater pipes in the house, etc.
Plus, normally it is set to display white=hot, black=cold. If you reverse the signal wires, it goes the opposite way. Might be handy for something, not sure what though.
It also frees up the HUD unit to do that graphic LCD idea, which will be a summer project for sure!
This is gonna be FUN! Now, time to go hunt down the cat...