Idle Air Control (IAC) Valve Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12162190 4-Way F Metri-Pack 150.2 Series Sealed P2S (BLK)
Pin	Wire Color	Circuit No.	Function
A	LT GRN/BLK	444	IAC Coil B Low Control
B	LT GRN/WHT	1749	IAC Coil B High Control
C	LT BLU/BLK	1748	IAC Coil A Low Control
D	LT BLU/WHT	1747	IAC Coil A High Control