I have owned this truck since 2006 and now have 56000 miles on it. The Duramax/Allison combo outshines the rest. I have hauled volleyball teams, 15000lbs 5th wheel up the Cascades, to work everyday and a multiple runs crosscounty and I smile everytime I start this truck up. Do I have complaints? One, the roof liner fit and finish leaves alot to be desired :( I have drove the rest and this is hands down the best. A Quiet diesel that can smoke the tires. I laugh when the Toyota boys try to pull something heavy up the mountains, they just don't have it. It will be the last truck I own.
Exterior body is great looking. I put on a aftermarket chrome bug guard, door handles, nerf bar and MKZ wheels. Steering wheel controls. Great leather seats for the long hauls. Duramax/Allison... nuff said.
The cloth roof liner does not sag but the fit around the molding is weak. Looks like GM cut corners where they could. Rearview camera. Lighted vanity mirror (for my wife).