Snip: "
I know from my work that there are "error" factors built into these ratings so that there is some room for people (like me) who push the limit. Usually it is anywhere from 25 to 50%. Rarely less than 25%. In other words, the real designed payload for 2600 rated would be 3250 to 3900lb."
So there you have it, It's official! I think the OP should remove the rating sickers from the truck and tear out those pages from the manual!
I wonder about the tire weight ratings. Oh yeah those are under rated also.:W