1959 Cadillac Heater Control Valve-Harrison. GM Part Number 3142638 group 9.795 This is a rebuilt Harrison Heater control valve that fits the following Cadillac's; 1959 Before VIN #051482. This is the early production correct valve that has the 3/4 inch outlet pipe. Valve is $295.00 plus shipping. This is sold on an EXCHANGE BASIS ONLY. We have the valves in stock.