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 Pontiac vehicles:
Acadian 1968-69
Beaumont 1968-69
Bonneville 1968-79
Catalina 1968-79
Executive 1968-70
Firebird 1968-79
Grand Am 1979
Grand LeMans 1976-77
Grand Prix 1968-69
Grand Safari 1971-78
Grandville 1971-72
GTO 1968-72
Laurentian 1968-77
LeMans 1968-79
Parisienne 1969-77
Strato-Chief 1968-69
Tempest 1968-70
Ventura 1971-77