I got scaled driving a 33' into NM and was about 1,000 pounds under the GVWR of 14,500. The rig was empty of everything but gas as I was delivering to a dealer. Still, it rode well but the power wasn't there until I engaged the Tow/Haul and then it got better.
2013 Chevy 3500HD CC dually
2014 Voltage 3600 toy hauler
2019 RZR 1000XP TRE