This was the worst vehicle i ever had. It broke down right as i was pulling out of the dealership. The dealership then actually charged me for towing it the 10 feet to the service area!! Turns out the axle was faulty. They also found that the radiator leaked too.
I've had this truck for almost 4 years, and I have nothing but good to say. I have a 37' 5th wheel, which when loaded is right at 16300 lbs and it pulls it great. Now I'm not going to tell you that I don't know the 5th wheel is back there, but this truck is a joy to drive while pulling. She'll be paid for in a couple of months, and I plan to keep her for a long time.
I haul a 11'6" Lance Legend camper and pull a 8'x12' trailer with it loaded with ATV's and a motorcycle and the truck does all I want it to. I traded a Powerstroke in and I am pleased that I did. It's quite and rides and handles a lot better then my old Ford. I am getting around 12mpg at freeway speeds with this load.
You can always ask for more, but this truck gives the best of all I have ever driven. The Duramax is quiet and it seems to have more pep than my old 350 gas. Over the road unloaded I have gotten 22 mpg at I-95 speeds. Pulling a medium size 5th wheel is a pleasure. The allison transmission is absolutely super. I will buy another. By the way my other car is a Ford ambulance (diesel), the powerstroke is great but can't hold a candle to the duramax. The Dodge is just too loud.