1964 Buick Riviera. 1965 Buick Riviera. 1966 Buick Riviera. Check Valve, Heater Valve. Vacuum Open Non-Bypass Heater Valve. Heater Valve. Type: Heater Valves. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
