My front axel weighs about 4400. Rear weighs around 2800. I am running stock tier pressures in the front fro 285/79/17 at 42psi. (Stock is 245/75/16 @ 55psi)35 is pretty low, way to low for suggesting on 7500 lb + CC empty.
The rear will be floating around unless it’s a single cab truck 5,000-5500 lb truck.
That’s what I run in my Yukon Denali on all 4 corners.
That’s also what my son runs on his single cab GMC Sierra 1500 5.2 gasser.
Rear stock is 245/75/16 @ 80 psi. With my new setup with 285/70/17, I can run 60 psi and it will be the equivalent to stock. At 35psi each tire can hold 2105lbs. So I am good at that psi empty. Even with a fill cab and some stuff in the back I will be ok.