My trailer is hooked to the truck and I am headed out there.
Half a million dimes!Post up your offer moneybags!

Damn, I wish I had the money. Maybe half a million pennies. I heard they may be worth more now that they stopped making them.Deal!![]()

Cmon down you can buy it and take home or fix it and take it home and it will be a heck of a lot closer to Florida where the current owner resides.My trailer is hooked to the truck and I am headed out there.
If both are from 2008, maybe it's a 6L80? It was phased in around '07 for upscale SUVs, but supposedly not in regular trucks until '09. If the transmission is for sure 1st year 4L60-E, that would be early 90's. I assume you know how many shifts it has!
The Denali line definitely got some of the options earlier than the standard trucks.I have a 2007 GMC Sierra Crew cab Denali with 6.2 and the 6L80E ,so definitely available in the trucks.