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Heavy-Duty Trucks: Auto Shift VS Straight Shift

GMC Heavy Duty Trucks of the 1960s

GMC, originally the "Rapid Motor Vehicle Company", was established in 1901 by Max Grabowsky. GMC has been producing cars, trucks, military vehicles, race cars, buses, SUVs, and vans for over 110 years. The 1960s saw not only the GTO, Corvair, Chevy Camaro and the Pontiac Firebird, but also a line of heavy duty trucks that qualify as classics in their own right.


  • GMC DLR/F/Crackerbox trucks were diesel tractor-trailer cabs used for highway freight cross-country transportation. They were manufactured from 1959 to 1968, though because of the quality of manufacturing and reliability they remained in use long after production ceased.

  • B-Series were marketed from 1960 to 1966 and used as work / farm trucks. They were larger than a standard heavy duty pickup but smaller than a tractor-trailer cab. Engine types varied from V-6 to V-12 depending on year and model. Detroit deisel was also available. These trucks came with a short bed attached to the cab. They were often purchased by communities for use as emergency response vehicles.

  • 1000 to 2500 series heavy duty pick-up trucks were manufactured during the 1960s. The 1000 came in two and four wheel drive, indicated by "K" in the model number.  Several different engine options were available.  

  • 3000 model pick-up trucks were produced for three years, from 1960 to 1963. They had the same body style as the 1000-2500, but had a much larger bed and wheel base. The 3000 models had a maximum payload of 14,000 pounds carried on a tortion bar which was independent from the suspension system.