I( towed a 27 ft 5th wheel with a Chevy dualy crewcab 454 v8 NEVER again!!!! I could pass anything but a gas truck or station.Through the mountains we could litaraly watch the gas gauge move.A friend has a 36 ft 5th wheel now and uses a Dodge with a cummins and is in love(he's a now former chevy only man).
I worked in the casinos of Laughlin Nv. for 10 yrs and the majority of the RVs were being towed by Dodges with the Cummins Diesel.They have more experiance than I ever thought Many traveled all over the place. Many from Canada. If I had my choice today it would be Cummins and Dodge.