Chevrolet Bison
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The Chevrolet Bison (and similar GMC General) were heavy-duty Class 8 trucks made by General Motors between 1977 and 1988. The Bison & General were both conventional rigs. Diesel engine choices included Caterpillar, Cummins and Detroit Diesel powerplants.
For some reason, the GMC version was more common than the Chevrolet version.