I have a 2008 2500HD Duramax CC 4X4 that I use for work. 103K on it, and it has been more reliable than my personal LBZ. It has not missed a day of work since I picked it up new. All maintenance is done on time and by the book. The mileage is not great about what I get with my 3500 DRW, 17 or so highway, 9-10 pulling a Northwood 28' Desert Fox toyhauler loaded to the limit with equipment. I would not be afraid of the 07.5 through 2010 Duramax trucks, yea they have a DPF and use a little more fuel but is essentially an LBZ with a DPF, certainly not the end of the world.
