1959 – 1970 General Motors Heater Vacuum Diaphragm Actuator GM # 1998916

This new old stock heater vacuum actuator (diaphragm)  was manufactured by General Motors for use on the following models:

Heater vacuum diaphragm 8.850 

Buick 1959 – 1964 All except Special (outlet control),

Buick 1965 – 1970 LeSabre, Wildcat, Electra (50-60-8000) outlet control,

Buick 1969 – 1970 Riviera (9000) less A/C.

Cadillac  1959 – 1964 except A/C – air inlet, 

Cadillac 1965 except 75 – air inlet / diverter valve on A/C,

Cadillac 1965 75 except A/C – air inlet,

Cadillac 1966  All – air inlet/ diverter valve on A/C,

Cadillac 1967-1970   Eldorado except A/C – air inlet and diverter valve,

Cadillac 1967-1968 except Eldorado – air inlet/diverter valve on A/C,

Cadillac 1969-1970 All except A/C – air inlet.

Oldsmobile  1959 – 1963 except F85  – defroster,

Oldsmobile  1959 – 1963 with Deluxe except CAC or F85 – inlet valve,

Oldsmobile 1964 –  1965 except F85, J88 – defrost and shutoff valve,

Oldsmobile 1966 – 1970 Toronado except CAC – inlet control valve,

Oldsmobile 1966 – 1967 Toronado with Manual CAC – shut off valve,

Oldsmobile 1966 – 1970 Toronado with CAC – shut off valve,

Oldsmobile 1968 – 1970 with CAC except F85 or Toronado – diverter valve.  

A/C Vacuum Valve 9.280

Cadillac  1961 – 1962 except 75, CC – outlet valve on blower case,

Cadillac 1967 – 1970 Eldorado – defroster valve on selector.

Outside Air Diaphragm 9.789

Oldsmobile 1966 – 1969 Toronado with  CAC – defroster valve.

Pontiac  1959 – 1970 application unknown.

Replaced 3143146 on 9/73

Note: Images show the condition and what is included in the sale.

*This item may be re-packaged to protect it from shelf wear.