When I brought my 2015 3500 GMC home the bed was a lot higher then my 2006 2500 Chevy.
I kept measuring and trying to figure out what I had to do.
By looking at the pin box when 5th wheel was level and the height of the bed I would have 1 inch clearance. If I set the B&W at the lowest point. if I set the B&W hitch at the highest point it would calculate a 3 inch clearance.
Talking with my RV dealer we figured we were over thinking this but did have some back up plans.
Once we installed the hitch and I set the 5th wheel on I moved the B&W hitch to middle position and now I have 6 inches of clearance and did not have to do anything to 5th wheel. The 5th wheel is almost dead level now. As it turned out we were over thinking it.
Good luck.
