OER Parts offers a wide selection of Air Conditioning and Heater Parts for your 1965 GMC 1000 Series. OER Parts offers 1965 GMC 1000 Series Air Conditioning and Heater Control Panels, 1965 GMC 1000 Series Air Conditioning and Heater Knobs, 1965 GMC 1000 Series Air Conditioning and Heater Levers and Cables, 1965 GMC 1000 Series Air Conditioning and Heater Relays, 1965 GMC 1000 Series Air Conditioning and Heater Switches.