Your vehicle’s Gross Vehicle Mass (GVM) is the maximum weight your vehicle can carry when fully loaded. Absolutely everything on your vehicle add to the the Gross Vehicle Mass and needs to be accounted for. This includes the vehicle itself, any load you’re carrying, fuel, accessories and also any additional tow ball load from a trailer, camper or boat. It’s important to understand that your vehicle GVM is not only a safety requirement, it’s a legal requirement as well. You’ll also notice that your vehicle won’t perform as well when driving close to the manufacturer’s factory GVM specification.