Heated Oxygen Sensor (HO2S) 2 Connector End View/Part Information/Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		KUM PB 625-04027 4-Way F NMWP 02F-B Assembly (BK)
Pin	Wire Color	Circuit No.	Function
1	L-GN	413	Heated Oxygen Sensor (HO2S) 2 Signal
2	BN	1671	Heated Oxygen Sensor (HO2S) 2 Heater Control
3	D-GN/BK	1670	Heated Oxygen Sensor (HO2S) 2 Low Reference
4	PK/D-BU	1734	Main Relay Output