Back View Of the PCM Connector C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		2.5L VIN 4 Powertrain 26 Pin Gray Connector C2 with Blue Terminal Secondary Lock Insert
Pin	Wire Color	Function
C2-1	BLU/YEL	VSS Input
C2-2	ORN/BLU	CKP Sensor Signal Low
C2-3	WHT/BLU	CKP Sensor Signal High
C2-4	RED	H02S Bank 1 Sensor 1 Signal
C2-5	BLK/RED	H02S Bank 2 Sensor 1 Heater Control
C2-6	GRY	H02S Bank 1 Sensor 1 Heater Control
C2-7	-	Not Used
C2-8	LT BLU	IAT Sensor Input
C2-9	YEL/GRN	CMP Sensor Signal High
C2-10	YEL/BLU	CMP Sensor Signal Low
C2-11	GRY/RED	Reference Voltage
C2-12	RED/GRN	TP Sensor Input
C2-13	RED/WHT	MAP Sensor Input
C2-14	BLU	H02S Bank 1 Sensor 2 Signal
C2-15	BLU/GRN	H02S Bank 2 Sensor 1 Signal
C2-16	PNK/WHT	H02S Bank 2 Sensor 2 Heater Control
C2-17	WHT/BLK	H02S Bank 1 Sensor 2 Heater Control
C2-18	-	Not Used
C2-19	PPL/RED	EVAP Canister Vent Solenoid Control
C2-20	GRY/YEL	Sensor Ground
C2-21	GRY/YEL	Sensor Ground
C2-22	ORN/BLK	ECT Sensor Input
C2-23	PPL/WHT	MAF Sensor Input
C2-24	BRN	H02S Bank 2 Sensor 2 Signal
C2-25	BLK/GRN	Ground
C2-26	BLK/BLU	Ground