<P> In 2002, GMC released a book entitled, GMC: The First 100 Years, a complete history of the company . </P> <P> GMC currently manufactures SUVs, pickup trucks, vans, light - duty trucks, and medium duty trucks . In the past, GMC also produced fire trucks, ambulances, heavy - duty trucks, military vehicles, motorhomes, and transit buses . </P> <P> Starting in 1920, GMC and Chevrolet trucks are virtually identical except for the grilles and nameplates, though their differences have varied over the years . From 1955 through 1959 small (less than 2 ton) GMC trucks with gasoline V8s were equipped with Pontiac, Buick, and Oldsmobile V8s (the Canadian trucks used Chevrolet engines). GMC had its own line of inline 6 cylinder engines, known as "Jimmy's" from 1939 - 1959, and their own V6 from 1960 - 1974 (also a V8, V12). Chevrolet trucks were marketed towards private ownership, while GMC was focused towards commercial uses . </P> <P> New Chevrolet vehicles are sold exclusively at Chevrolet dealerships, GMC light trucks have recently been made available to Buick and Cadillac dealerships with previous Pontiac and Oldsmobile dealerships also having similar arrangements, and separate franchises exist for medium and light - duty commercial models as well . This crossover allowed GM dealers that did not sell Chevrolets to offer full lineups of both cars and trucks by offering GMC's trucks alongside "non-truck" divisions . Between 1962 and 1972, most GMC vehicles were equipped with quad - headlights, while their Chevrolet clones were equipped with dual - headlights . </P>

Whats the difference between a gmc and a chevy
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