Gross Vehicle Weight (GVW):  The empty weight of a vehicle plus the weight of its load in addition to the empty weight of a towed unit and its load weight.

Gross Vehicle Weight Rating (GVWR): The weight or value specified by the manufacturer as the maximum loaded weight of a single or combination vehicles.  The gross vehicle weight rating of a combination vehicle (commonly referred to as the “gross combination weight rating) is the gross vehicle rating of the power unit plus the gross vehicle weight rating of a towed unit.