My buddy has the same truck you are looking at (2011) and a similar weight trailer (
CLICK). Power is not an issue but that trailer pushes his truck all over the place! I re-set up his WDH (with Friction Sway Control) after the dealer did it wrong (suprise!) so I know it is correct. It is a 2 handed job to keep it in the lane and you never want to go over 60. By comparison I have pulled his trailer home from the dealer once with my truck (2500hd in sig) with only a 2 5/16" ball (no WDH) and I could comfortably run 70 with one hand on the wheel. Also his truck will overheat in 80* heat pulling a 6% grade. I can pull my heavier trailer up the same hill in 105* heat with the AC on Full blast and my Temp gauge never moves.