OER Parts offers a wide selection of Air Conditioning and Heater Parts for your 1949 Chevrolet Truck. OER Parts offers 1949 Chevrolet Truck Air Conditioning and Heater Control Panels, 1949 Chevrolet Truck Air Conditioning and Heater Knobs, 1949 Chevrolet Truck Air Conditioning and Heater Levers and Cables, 1949 Chevrolet Truck Air Conditioning and Heater Relays, 1949 Chevrolet Truck Air Conditioning and Heater Switches.