Curb weight is the weight of the vehicle including a full tank of fuel and all standard equipment.
It does not include the weight of any passengers, cargo, or optional equipment. Curb weight is considered the closest weight to the actual weight of the vehicle.
A truck's payload capacity refers to the maximum amount of weight you can safely add to a truck's cargo area in addition to its empty weight (or curb weight).
sorry MADDOG, i just looked it up