"Had the truck 17 mos. 40,000 miles. Fuel economy getting steadily better, best highway empty 17, heavy trailer 12-14K 10-12 MPG. Love the ride, great towing truck. Little things like seat memory, wife is only 5' set up #2 for her it adjusts everything to suit her, I get in and right back to where I like it. Sharp looking truck, good puller, also use it with a slide in camper, added air bags and super hitch to still pull 28' enclosed trailer, camper 4K trailer 12K. Laughs at hills, set the cruise and up you go. I did notice a little surface rust on my front bumper, and some suspicious spots on the tubular running board from factory."
"Great truck with a lot of options not offered by the other Heavy Duty platforms. Rearview camera system is a dream. The tailgate step is such a simple but vital invention, it's amazing no one came up with it before. The attachable bed extender is designed very well, the wife loves it. Very quiet compared to past models. The interior is easily the best in its class. Very comfortable (for a truck).
The Diesel Engine is the worst in its class. Specs have it rated the same as the Dodge, however, this beast weighs more (much more) and reaches max torque at a higher RPM level. You won't notice the difference unless you're hauling a jumbo jet or trying to run the quarter mile.
Gas mieleage is on par with an M-1 Abrams. Granted, this is a truck, but the Cummings and the Duramax put out the same or better numbers, and do so with better mileage. Tweak the engine a little and this bad boy would, hands down, blow away the competition.
The 5-Speed transmission works real well, but I think it would benefit greatly with an extra gear like the 6-Speed Allison.
Overall, still an awesome machine."
"I have been a chevy owner(unfortunately) for the past ten years. Chevy cannot stand up to this beast. All of my friends have chevy's and i've had about five calls just today to come pull them out of the mud on their fields. It is exellent in every way, I usually get about 18 mpg driving around town, and on the highway the best i've ever had was about 26 mpg."
"The engine/chassis combination is fabulous but is totally ruined by the program updates from Dearborn. After initial breakin I was getting 16 in town 21 highway.After each dealer service my mileage decreased until it is now 9/13. The power initially was amazing; I could pull a house. Now I can hardly climb hills. Last dealer visit, a factory rep said get a new 6.7L the factory had no plans to fix the problems with the program downloads for the 6.4L. Sounds like the 6L fiasco all over. So I'm selling and looking elsewhere. Love the truck! Hate what the factory did to it and me!"