"Curb Weight is the actual weight of the truck without any passengers or cargo in it. Its the base weight that is used in subtraction to calculate the total weight of the vehicle with passengers and cargo.
Gross Vehicle Weight is the total weight of the loaded vehicle. This includes the vehicle itself and the cargo that is loaded within that vehicle.
Gross Vehicle Weight Ratings are the ratings that are calculated by the manufacturers as to be the amount of weight that the vehicle will be when the vehicle itself is weighed filled with gasoline and loaded according to manufacturers specifications."http://www.epinions.com/auto-review-6831-2573C29A-3A390A3D-prod2