The spec tongue weight in the brochure is for the "as designed" basic camper (NO OPTIONS) that was speced when the camper was drawn up.
It was meaningless when the parts finally hit the factory floor and the "as built" changes started.
The yellow sheet does list the actual factory out the door weight (and the as built remaining payload; BUT NO TONGUE WEIGHT).
For that you need to hit the scales.
For example the air conditioner is an option. Its weight is not on the brochure, but it is included in the yellow sticker.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW