Gvwr stands for gross vehicle weight rating. It means that the total weight of a road vehicle or a loaded trailer has reached the maximum weight allowable. If a vehicle is over the total weight when loaded, it can hinder the driver to slow down or stop in a safe manner. It can damage the suspension. It can also cause the tires to overheat with the excessive weight. For more information visit
. http://auto.howstuffworks.com/auto-parts/towing/towing-capacity/vehicle/gvwr.htm.