GCWR vs GVWR question

I've got to differ a little with D. Brakes are designed to stop the gross COMBINED vehicle weight. They'd be in serious legal difficulty if they posted that a truck could haul & tow that weight without being able to stop it. Might not stop it very fast though and that's why anything over 3k has to have brakes (think that's in all states, but not certain). I will add though that you'd be right at your maximum and a 3/4 ton truck is almost always just a beefed up 1/2 ton. While I've seen many of them towing large 5ers, I personally wouldn't do it - that's why I insisted on trading my old 3/4 in when LOML said she wanted a Monty. I towed a 27' TT with the old truck for four years and about 40,000 miles, and the difference is amazing. Our F350 dually towing our Monty is a whole different world, much more comfortable, stable and easier to drive.