IXO 1:43 1980 GMC General, Silver w/Custom Stripes

The GMC General (also known as the Chevrolet Bison) is a heavy-duty (Class 8) truck that was assembled by the GMC Truck and Coach Division of General Motors. The largest conventional-cab truck ever produced by General Motors, the product line was introduced for 1977, replacing the C/M 90/9500 trucks. After 1981, the Chevrolet Bison was discontinued, following the withdrawal of Chevrolet heavy-truck production.

In 1986, General Motors entered a joint venture with Volvo to produce heavy trucks, leading GMC to end production of the General conventional and Astro cabover in 1987. As of 2020 production, the 1987 GMC General and Brigadier are the final Class 8 conventional-cab trucks produced by General Motors.

The GMC General and Chevrolet Bison were assembled in Pontiac, Michigan at Pontiac East Assembly (alongside the Chevrolet Bruin and GMC/WhiteGMC Brigadier)

In 1966, GMC Truck and Coach introduced its first dedicated heavy-duty trucks, moving away from trucks adapted from the smaller C/K line. The division introduced two lines using a common cab, the H/J-Series (93-inch BBC) and the C/M-Series (112-inch BBC). Using a longer hood, the C/M-series trucks were designed to accommodate larger diesel engines, such as the Cummins NH and Cummins V903, and the Detroit Diesel 8V71. The center-hinged "butterfly" hood of the H/J-series was replaced on the C/M by a front-hinged fiberglass hood. Following the introduction of the medium-duty C/K in 1973, the 112-inch BBC truck was consolidated to the M-Series.

Similar in layout to the Ford LTL-9000, International Harvester Transtar 4300, and Mack Super-Liner, the Chevrolet Bison and GMC General are Class 8 conventional trucks. Produced with an all-aluminum cab built by Budd, the trucks were available in many different combinations. Two hood configurations were offered (108-inch or 116-inch BBC); along with a day cab, a 34-inch sleeper cab was offered, along with a walk-in sleeper cab (introduced in 1985).

While no gasoline engines were available, several diesel powerplants were available, with the Detroit Diesel 6-71 (later replaced by the 6V92) as the standard engine. Alongside the 6-71, a buyer could choose the Cummins N-series, or Detroit Diesel 8V71 and 8V92. Following its introduction in the GMC Astro, the Caterpillar 3406 was introduced in 1982. When introduced in 1977, the Bison/General were available from dealers as vehicle gliders. Essentially a complete truck with the exception of the engine, transmission, and rear axles, the incomplete vehicles were designed for a dual purpose: to either reinstall an existing powertrain in a new truck or to allow for further customization not available from a dealership.