Where does the GVWR come from??????
Everyone is always talking weights GVWR, GCWR and Payload (CCC). I always read, “oh it’s a made up number”, “a 2500 can haul or carry the same as a 3500”.
Here is what I have found and where, IMHO I think the weight stickers on our door jambs come from.
Below are excerpts from 49 CFR.
49 CFR 575.103 Truck-camper loading.
Here is how I read it.
(a) Scope. This section requires manufacturers of slide-in campers to affix to each camper a label that contains information relating to identification and proper loading of the camper and to provide more detailed loading information in the owner's manual. This section also requires manufacturers of trucks that would accommodate slide-in campers to specify the cargo weight ratings and the longitudinal limits within which the center of gravity for the cargo weight rating should be located.
(b) Purpose. The purpose of this section is to provide information that can be used to reduce overloading and improper load placement in truck-camper combinations and unsafe truck- camper matching in order to prevent accidents resulting from the adverse effects of these conditions on vehicle steering and braking. (c) Application. This section applies to slide-in campers and to trucks that are capable of accommodating slide- in campers.
(c) Application. This section applies to slide-in campers and to trucks that are capable of accommodating slide- in campers.
(d) Definitions. Camper means a structure designed to be mounted in the cargo area of a truck, or attached to an incomplete vehicle with motive power, for the purpose of providing shelter for persons. Cargo Weight Rating means the value specified by the manufacturer as the cargo-carrying capacity, in pounds or kilograms, of a vehicle, exclusive of the weight of occupants in designated seating positions, computed as 68 kilograms or 150 pounds times the number of designated seating positions.
When the truck-camper is loaded, drive to a scale and weigh on the front and on the rear wheels separately to determine axle loads. The load on an axle should not exceed its gross axle weight rating (GAWR). The total of the axle loads should not exceed the gross vehicle weight rating (GVWR). These weight ratings are given on the vehicle certification label that is located on the left side of the vehicle, normally on the dash panel, hinge pillar, door latch post, or door edge next to the driver on trucks manufactured on or after January 1, 1972. If weight ratings are exceeded, move or remove items to bring all weights below the ratings.”
(2) Trucks. (i) Except as provided in paragraph (e)(2)(ii) of this section, each manufacturer of a truck that is capable of accommodating a slide-in camper shall provide to the purchaser in the owner's manual or other document delivered with the truck, in writing and in the English language, the information specified in paragraphs (e)(2)(i) (A) through (E) of this section.
(A) A picture showing the manufacturer's recommended longitudinal center of gravity zone for the cargo weight rating in the form illustrated in Figure 4. The boundaries of the zone shall be such that when a slide-in camper equal in weight to the truck's cargo weight rating is installed, no GAWR of the truck is exceeded.
(B) The truck's cargo weight rating.
(C) The statements: “When the truck is used to carry a slide-in camper, the total cargo load of the truck consists of the manufacturer's camper weight figure, the weight of installed additional camper equipment not included in the manufacturer's camper weight figure, the weight of camper cargo, and the weight of passengers in the camper. The total cargo load should not exceed the truck's cargo weight rating and the camper's center of gravity should fall within the truck's recommended center of gravity zone when installed.”
(D) A picture showing the proper match of a truck and slide-in camper in the form illustrated in Figure 3.
(E) The statements: “Secure loose items to prevent weight shifts that could affect the balance of your vehicle. When the truck camper is loaded, drive to a scale and weigh on the front and on the rear wheels separately to determine axle loads. Individual axle loads should not exceed either of the gross axle weight ratings (GAWR). The total of the axle loads should not exceed the gross vehicle weight rating (GVWR). These ratings are given on the vehicle certification label that is located on the left side of the vehicle, normally the dash, hinge pillar, door latch post, or door edge next to the driver. If weight ratings are exceeded, move or remove items to bring all weights below the ratings.”
Okay, they GM, Ford, Dodge pay people a lot more than I make to comply with Federal regulations. So I believe they have a very good reason to set the GVWR and CCC where they do for a particular truck.
Oh by the way I checked inside my glove box and my CCC is 1763 lbs. Guess what 7500 lbs base weight, GVWR 9200 lbs, = 1700 lbs CCC.
Okay I’ve said my piece, now I’ll just sit back and chuckle at the comments.