I have a 2020 3500HD High Country, SRW, Z71, 8 foot bed with 20 inch wheels and pull a 2013 36 foot 5th wheel 14K GVWR. This truck also has the camper front torsion bars. Basically the snow plow option without the electrical for the snow plow. 6000 GVW front axle, 7200 rear axle rating. Truck GVWR 12,250 lbs. Just because the front axle is higher the total GVWR doesn’t change. I had to upgrade the suspension on the RV and change the RV pin box because the truck is so tall trying to maintain 6 inches between the truck bed and the RV and to prevent towing nose high. My truck bed height is 37.5 inches and the bed side to ground is 59 inches. I installed the Morryde SRE 4000, heavy duty shackles, spring eye wet bolt-with X braces and a Morryde rubber pin box. I’m still towing about 2 inches high in the front vice 5 inches without the mods. Truck and RV on the cat scale loaded is right at 23,500 and the truck weight is 12,000 lb. Also the 5th wheel hitch from a earlier GM truck will not fit the 2020 and newer truck pucks. My truck spare tire is 18 inch wheel. Someone already mention to check the door tag for GVWR and tow capacity. Hope this info helps.