check here

2006 GMC (http://www.theautochannel.com/news/2005/03/02/002739.html)

Cool. I wonder how much more it will cost. I'm confused. It looks like it's only going to be offered on commercial vehicles. So, I'm guessing you can't get it in a conversion van. Or, is the bare chassis yf7 conversion package considered a commercial vehicle? And, I wonder why they're mating it to a 4l85e tranny instead of the Allison. Aren't the pickups using the Allison? I have a '04 3500 Conversion van with the 6.0 gas engine and love it. Only 1 ton conversion van around. Could be a collectors item some day, hahahahahahaha.