And let me tell you. I had my toy hauler loaded up. Maybe shy of 9k lbs. Towed up to woods canyon lake out here north of payson, az for those of you who know where thats at. Quite a few 6% grades up and down. The truck did awesome. Egts stayed down with a high of 1268 going up the last 6 mile long 6% grade and I averaged 14.5 mpg the entire trip. Pulled the hills at 55 with plenty of power to spare and the trans would downshift when it was supposed to and keep me slowed down on the downhills. I traded in my titan for this truck and its a world of difference. Great truck going up and down the hills!