Looking at what MTU just posted and comparing to your part number you have the baddest bad boy of the bunch! 6k lbs! Guess when they combine the heavy diesel and the snow plow prep you deserve the best! All kidding aside, and not trying to insult your intelligence at all, have you checked the air pressure in your front tires? Maybe it's crazy high from the dealership. Even if its not too high try turning it down to 45 or 50 or something like that. It will make a noticeable difference. I have a '15 2500HD with the snow plow prep and the ride is entirely different at 60 vs 50 psi in front. I might take a little hit to the mpg but I don't care. I adjust mine back up when towing my camper but for daily driving I adjust the front and rears down and it turns it into a different truck. Give it a shot if you haven't yet.