As I learned a couple of weeks ago when I traded my '06 for an '07, this is a creative marketing ploy by Hummer.
All 2007's have a $950 rebate (available with 0% interest). If the truck has a sunroof, that means you get the sunroof free (MSRP of sunroof is $950). If it doesn't have a sunroof, you get the $950 rebate anyway.
The salesman actually explained this to me with a straight face. I can only imagine the hours he spent practicing in front of a mirror so that he wouldn't die laughing as he said it.
Oh, by the way, I got the sunroof.
