First off a trucks GVWR doesn't determine how much load any truck can carry legally. Your state motor vehicle size and weight folks can help you with the legal aspect of how much weight you may carry per the truck mfg stickered ratings.
Your trucks legal/safe hitch load capacities revolve around the trucks RAWR as its going to carry the hitch load placed in the bed. Course everyone knows the tires capacity is equal or may exceed the highest FAWR or RAWR.
And your state may require you to have some type of weight for registration/tax paid purposes. Some do not as mine. We simply carry hitch weight up to the RAWRs/tire load capacities.
It pretty simple to figure how much hitch load any truck can carry safely if you have separate front and rear axle weights.
Example; Many 2500 trucks may have a 2800-2900 rear axle weight when empty. Subtract that number from your trucks 6200 RAWR leaves you with approx 3200-3300 lbs for a payload.
Some folks use the GVWR method of subtracting the trucks scaled weight from its GVWR. Folks with "some" of the new trucks with those high GVWR numbers need to be aware that GVWR payload number can overload the trucks RAWR/tires.
