Curb wt 2018 Chevy 3500 SRW CC standard bed

Hi all: looking for the actual wt curb wt (2 passengers, full fuel, fifth wheel hitch) on a 2018 Chevy or GMC 3500 CC 4WD SRW Duramax standard bed. I am trying to determine the max kingpin wt for this truck, which will then determine the next fifth wheel trailer.

I found GM source listed the curb wt at 7548 lbs. Probably no passengers, fuel, or fifth wheel hitch.

Thanks