AC Delco 3 port vacuum switch. 1/2"-14 NPT. Ships in AC Delco box.
This is the only replacement available for the TCS transmission controlled vacuum spark advance.
Fits the following Buick vehicles:
Apollo 1973-75
Centurion 1971-73
Century 1973-76
Electra 1968-76
Estate Wagon 1970-76
GS 1970-72
GS 350 1968-69
GS 400 1968=69
GS 455 1970-72
LeSabre 1968-76
Regal 1968-76
Riviera 1968-76
Skyhawk 1975
Skylark 1968-76
Special 1968-69
Sportwagon 1968-72
Wildcat 1968-70