I've been on the phone today with about 4 different dealers in the area asking when I could come place an order for a 2015i version.
One of them hadn't even heard that the Yukon Denali is getting the 8 speed. He insisted that the current shortage of Denali is related to a part for the rear differential being in short supply.
Another told me that the current short supply is because GM didn't have enough of the wheels that come on the Denali. She was unsure as to when the 8 speed could be ordered.
One wasn't interested in picking up the phone.
The fourth knew the 8 speed was coming and said that they didn't have pricing yet but would know something "soon." This was after I spoke with a different salesperson who kept insisting that I must be confused and must be talking about the 6.2 v. the 5.3.
I gotta say, it's not unusual for me to be more knowledgable about a car I'm about to buy than the salespeople, but this has got me shaking my head and chuckling.