HVAC Heater Control Valve 4 Seasons For 1970-1972 Chevrolet Blazer

Check Valve, Heater Valve. Vacuum Closes Non-Bypass Heater Valve. Heater Valve. Type: Heater Valves. 1970 Chevrolet Blazer Engine: 5.0L V8; w/ A/C;. 1970 Chevrolet Blazer Engine: 5.7L V8; w/ A/C;. 1972 Chevrolet Blazer Engine: 5.0L V8; w/ A/C;.