When doing the "build" on the GM website and as indicated in the window sticker, the $100 A/C charge is included by GM itself. Then for me, my dealer initial's invoice simply said: $X for the "MSRP" and that amount was made up not only with the GM amount for the car itself, but also the "destination charge" plus the A/C $100 charge although none of that was broken out...it was simply all lumped together under "MSRP". Then there was a separate charge on the dealer invoice for an "air levy $100". Knowing it was a duplication was easily missed unless you realized it was already subsumed in the "MSRP" charge. When I pointed it out, my dealer claimed it was an error and deleted it, but I suspect most dealers include it as a way to scoop another $100, knowing full well it's been charged already and "hidden" in the MSRP amount. And it's interesting it was described as an "air levy" rather than A/C on my dealer's initial invoice, arguably making it different than the government's A/C tax...but that's what it is.
And Murray/Denis I can't believe you'd be charged for "fuel": ALL new vehicles I've ever purchased came with a full tank of gas, including my C8. Oh well...hopefully it's not a trend that catches on with dealers.