I don't think so. I think the chassis sticker inside the door was put there before U-Haul put their box on. The sticker I think should say what each axle is rated for, and then what the entire truck max weight would be allowed. And then it might say what the gross combined weight rating is. That would be the weight of the truck and whatever you are towing. I think anyhows. Maybe I'm wrong though.
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio