I bought the truck to tow a 6,000 lb travel trailer with room to upgrade to something heavier. Our first outing netted 13 mpg at the California mandated 55 mph towing speed limit. It achieves about 22 mpg sans trailer. The driver's door shudders on bumpy roads and is poorly sealed. The transmission shifts down quite hard when coming to a stop. Cruise controls are very awkward. Very rough riding. Love the Cummins 6.7 liter. It has yet to shift down out of 6th gear on cruise control. We now have 1500 miles on it and look forward to thousands more.
The Cummins engine. It fits in my garage.
For towing RV's, could be lower and more comfortable for long range driving. Better control ergonomics - paddle shifters, adaptive cruise control, gas pedal too vertical, sharp front edge of seat, climate control option, adaptive suspension (stiff loaded, soft in cruise mode), dip stick tough read.