All those trucks are fantastic. I started with a GMC Sierra 1500
gas and was towing my 27 foot Globetrotter and it worked OK but you could really feel the trailer back there. I traded in the globetrotter for a 30 foot Classic and the Sierra 1500
wasn't cutting it anymore.
I was convinced that I needed to stay with a gas Sierra 2500 but once I drove the diesel I was hooked. We town the Classic all over the place and you would not even know it was back there. We got back from the mountains today and NO issues thought the mountain passes.
I fought and fought and fought going diesel and now that I took the plunge I will never go back.
I have friend that have the Ford and Ram and they love them as well (they are diesel too)