Officially GM made this as a 1/2 ton , HOWEVER , here in NZ , we added some extra leaf springs , called it a 3/4 ton

LOL.
I still added another leaf , a sway bar and E load tires .
Camper actual weight is 610 Kgs.
Chassis flex is interesting ...
I've had the truck for 23 years and done some 80k miles .