Yeah, it looks like the steering wheel module may not work with the 2005 or 2006 Grand Prix that I am looking at, and they don't make HUMounts for the newer Prix models...
I pulled it all out today.... In the rain.... And it was 45F out... At least the inside of the car was dry! I thought that I better get some pictures before I took the stereo out.
Below is what a (my) HUMount looks like with the headlights off, then what it looks like during the day if you have your headlights on (which triggers the HUMount light), and lastly what it looks like at night with lights on of course.
