. "The GMC straight-6 engine was a series of gasoline-powered straight-six engines introduced in the 1939 model year by the GMC Trucks division of General Motors. Prior to the introduction of this new engine design GMC trucks had been powered by straight-six engines designed by the Buick, Pontiac and Oldsmobile divisions of GM. The new engine family featured a valve-in-head design, pioneered by Buick and also used by the Chevrolet division's contemporary \"Stovebolt Six\" engine. Many displacements were produced using three block sizes: \"Group 1\" (small), \"Group 2\" (mid-size) and \"Group 3\" (large)."@en . "1939"^^ . . . . "1431106"^^ . "9156"^^ . . . . . . . "223"^^ . . . . . . . . . . . . . . . . . "230"^^ . . . . "324"^^ . . . . . . "1962"^^ . . . . . . "GMC straight-6 engine"@en . . . . . . . . . . . . . "OHV, 2 valves per cylinder"@en . . "1070340695"^^ . . . . . . . . . . . "I-head"^^ . . "GMC straight-6 engine"@en . "The GMC straight-6 engine was a series of gasoline-powered straight-six engines introduced in the 1939 model year by the GMC Trucks division of General Motors. Prior to the introduction of this new engine design GMC trucks had been powered by straight-six engines designed by the Buick, Pontiac and Oldsmobile divisions of GM. The new engine family featured a valve-in-head design, pioneered by Buick and also used by the Chevrolet division's contemporary \"Stovebolt Six\" engine. Many displacements were produced using three block sizes: \"Group 1\" (small), \"Group 2\" (mid-size) and \"Group 3\" (large). The straight-6 engine was replaced by the GMC V6 engine in 1960, remaining in use only in certain light-duty models of the P-series step van until 1962."@en . "GMC straight-6 engine"@en . . . "1939"^^ . . .