Passlock Sensor (Part of Ignition Lock Cylinder) Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191747 3-Way F Micro-Pack 064 Series (BLK)
Pin	Wire Color	Circuit No.	Function
A	YEL	1836	Security System Sensor Signal
B	BLK	1835	Security System Sensor Low Reference
C	WHT	1459	Security System Sensor Supply Voltage