In 1966, the GMC division moved its school bus chassis from the mediumduty C/K to the all new H6500 heavy truck. A forerunner of both the GMC Brigadier and GMC General, the Hseries trucks featured an allsteel front fascia with a centerhinged butterfly hood for engine access. Alongside GMC V6 and V8 gasoline engines, GMC school bus chassis were available with Detroit Diesel 6V53 V6 diesels.
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