I have always owned large fifth wheels pulling with 3/4 ton diesel. Will now be going to a TT. I own a 2017 4X4 1500 Crew Cab Silverado with a 5.3 gas with 3.42 rear end and 6 speed trans. The max tow...
I have a 20' 4340 lb dry wt., -5300 lb loaded wt. As I load it TT. My TV 2011 Silverado 1500 LS (work truck) 9800 tow, 5.3 gaser, 3.73 rear end, and 6 speed trany!
I've had to upgrade the tires to "E", air bags, upgraded TT suspension (wetbolts, brass bushings and EZ-Flex)
On my experience I would not go over 5000 dry TT with my setup.