This is a new heater control valve to fit the Buick vehicles listed below.
This heater valve is normally closed and requires vacuum to open it.
Fits:
Buick Electra 1964-1970
Buick Estate Wagon 1970
Buick LeSabre 1964-1970
Buick Riviera1964-1970
Buick Skylark 1964-1972
Buick Wildcat 1964-1970