OER Parts offers a wide selection of Automatic Trans & Components for your 1979 GMC K2500. OER Parts offers 1979 GMC K2500 Complete Transmission, 1979 GMC K2500 Cooler Lines, 1979 GMC K2500 Dipsticks & Tubes, 1979 GMC K2500 Flex Plate, 1979 GMC K2500 Gaskets, Seals, Filters & Hardware 1979 GMC K2500 Modulator Valves, 1979 GMC K2500 Shift Knobs, 1979 GMC K2500 Shift Linkage, 1979 GMC K2500 Shifters - OE, 1979 GMC K2500 Shifters - Performance, 1979 GMC K2500 Torque Converter & Covers, 1979 GMC K2500 Transmission Pans, and 1979 GMC K2500 Vacuum Lines.