We ft with a 3500 SRW short bed Duramax Chevy. We are SO happy we got the short bed. We chose to pull with a Pull-Rite automatic slider hitch. It has done very well in our 3 years ft, including over the Rockies. Our RV is rated at 15000, but scales at less. Even with the 3500, hitch weight will be the biggest question & challenge. Our RV is within the truck specs. Don't forget that clothes, W/D, generator, chicks & blocks etc will impact hitch weight, as well as anything in the back, or back seat of the truck. Our hitch weighs 200 lbs. For a SRW, I would not exceed 15000 lbs. Less gives you a better margin. Good luck with your decision!