Heated Oxygen Sensor (HO2S) Sensor 1 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12092839 4-Way M (BLK)
Pin	Wire Color	Circuit No.	Function
A	TAN/WHT	1669	HO2S Low Signal Sensor 1
B	PPL/WHT	1668	HO2S High Signal Sensor 1
D	PNK/BLK	5294	Ignition 1 Voltage
E	GRY/WHT	3122	HO2S Heater Low Control Sensor 1