For 1970-1972 Chevrolet C20 Pickup - HVAC Heater Control Valve Four Seasons

1970 Chevrolet C20 Pickup w/ AC;. 1971 Chevrolet C20 Pickup Engine: 5.0L V8; w/ AC;. 1971 Chevrolet C20 Pickup Engine: 5.7L V8; w/ AC;. 1972 Chevrolet C20 Pickup Engine: 5.0L V8; w/ AC;. 1971 Chevrolet C20 Pickup Engine: 6.6L V8; w/ AC;.