Capt. D- I didn't see any Denali HD's in the grey, just in black and in white. Although, if I had to chose other than white, I would have stuck with the Black for sure. As far as the difference between the Chevy LTZ and the GMC Denali HD, they both had the same price, $61k. I was pretty shocked when i compared them because the Denali is MUCH nicer on the inside. I am not Knocking Chevy, just stating what I saw. I like them both, but if you are going to spend that much money, might as well get the one with the nicer interior.