OER Parts offers a wide selection of Manual Transmissions & Parts for your 1965 GMC 2500 Series. OER Parts offers 1965 GMC 2500 Series Bearings, 1965 GMC 2500 Series Boots, 1965 GMC 2500 Series Complete Transmissions, 1965 GMC 2500 Series Flywheel, 1965 GMC 2500 Series Gaskets, Seals & Filters, 1965 GMC 2500 Series Gears, 1965 GMC 2500 Series Hardware, 1965 GMC 2500 Series Shift Knobs, 1965 GMC 2500 Series Shift Linkage, 1965 GMC 2500 Series OE Shifters, and 1965 GMC 2500 Series Performance Shifters.