People often forget to add the weight of a full tank of gasoline, Yx6.5 pounds, motor oil 2 pounds per quart, coolant ~40 pounds, full washer bottle ~4 pounds and a few pounds for misc fluids. So whatever that doorjamb sticker says, subtract 250 pounds to cover everything, more if you have a really large fuel tank or duel tanks. Then add the weight of spare tire and jack, assorted other tools, assorted other "stuff" people always have somewhere in there. Then how much do you weigh? How often does someone ride with you? Unless it's absolutely 100% never you have to account for them as well. So the doorjamb says you're good for 1,734 pounds. Surprise! After allowing for yourself, full fuel tank and everything else you are maybe good for 1,250 actual pounds of widgets loaded in/on the truck. Less if someone is often with you.