Two years ago, I bought a 2015 Chevy 1500 with the 6.2. It also has the max tow package which includes a bigger radiator, tow mirrors (which I love), electric trailer brake controller, and a few other things as part of the max tow pkg. Although I haven't towed anything as heavy as what you want to do, I can tell you it does not lack in the power department. The engine is factory rated at 420hp/460torque. As a daily driver, I average around 17-19 mpg mixed city and highway (unloaded), and 21-22 hwy, with best being right at 23. Not bad for a 5500lb truck.
