Powertrain Control Module (PCM) Connector End Views (AWD)

Back View of PCM Connector C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		34-Pin WH
Pin	Wire Color	Function
1	YE	Fuel Injector 1 Control
2	BK	Fuel Injector 2 Control
3	WH	Fuel Injector 3 Control
4	BU	Fuel Injector 4 Control
5	BN	Ground
6	WH/BK	Ground
7	WH/BK	Ground
8	RD/BU	Ignition Trigger Signal Coil 1
9	YE/GN	Ignition Trigger Signal Coil 2
10	GY	Ignition Trigger Signal Coil 3
11	WH	Ignition Trigger Signal Coil 4
12	BK	Crank Signal
13	BK/YE	Camshaft Position (CMP) Actuator Solenoid Valve High Control
14	YE	Camshaft Position (CMP) Actuator Solenoid Valve Low Control
15	-	Not Used
16	BK/BU	Idle Air Control (IAC) Valve Control
17	-	Not Used
18	YE	5-Volt Reference Circuit
19	WH	Engine Coolant Temperature (ECT) Sensor Input
20	YE/BK	Intake Air Temperature (IAT) Sensor Input
21	L-GN	Throttle Position (TP) Sensor Input
22	-	Not Used
23	RD	Ignition Positive Voltage
24	BU/YE	Ignition Fail Safe Input
25	RD	EVAP Vent Solenoid Valve Control
26	BK	Camshaft Position (CMP) Sensor Input
27	BK	Crankshaft Position (CKP) Sensor Input
28	BN	Sensor Ground
29	WH/BU	Mass Air Flow (MAF) Sensor Signal Low
30	GN	Mass Air Flow (MAF) Sensor Signal High
31-33	-	Not Used
34	WH	CMP Sensor and CKP Sensor Ground

Back View of PCM Connector C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WH
Pin	Wire Color	Function
1	BK	Knock Sensor (KS) Signal High
2	WH	Knock Sensor (KS) Signal Low
3-5	-	Not Used
6	PK	Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control
7	WH/BK	Ground
8	GY	EVAP Vacuum Leak Pump Control
9	L-GN/BK	Fan 2 Relay Control
10	BU	Shift Solenoid (SS) 2 Control
11	RD/YE	Shift Solenoid (SS) 1 Control
12	PK	Line Pressure Control (PC) Solenoid Control Low
13	RD/WH	Line Pressure Control (PC) Solenoid Control High
14	-	Not Used
15	BU/WH	Torque Converter Clutch (TCC) Control
16-18	-	Not Used
19	BU/BK	EVAP Canister Purge Solenoid Control
20	BU/OG	Shift Solenoid ST Control
21	L-GN	Fan 1 Relay Control
22	BK	Heated Oxygen Sensor (HO2S) 1 Input
23-25	-	Not Used
26	WH	Input Shaft Speed Sensor Reference High
27	YE	AC Pressure Switch
28	WH/BK	Ground
29	-	Not Used
30	BU/RD	Power Steering Pressure (PSP) Switch Input
31	-	Not Used
32	WH/BU	Transmission Fluid Temperature Sensor Input
33	-	Not Used
34	BK	Input Shaft Speed Sensor Reference Low
35	-	Not Used

Back View of PCM Connector C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WH
Pin	Wire Color	Function
1	-	Not Used
2	GN/BK	Overdrive (OD) Switch Signal
3	BK	Engine Speed Output for Tachometer
4	BK/WH	EFI Relay High Control
5	YE/BK	AC Compressor Clutch Relay Control
6	-	Not Used
7	L-GN	Overdrive (OD) Indicator Control
8	L-GN/BK	Park Neutral Position (PNP) Switch L Position Signal
9	L GN	Park Neutral Position (PNP) Switch 2 Position Signal
10	BU	Park Neutral Position (PNP) Switch D Position Signal
11	RD/BK	Park Neutral Position (PNP) Switch R Position Signal
12	-	Not Used
13	BU/WH	Cruise Control Idle
14	YE/RD	Engine Coolant Temperature Gage Output
15	BU/RD	Serial Data Line
16	GN/RD	Circuit Opening Relay Control
17	PU/WH	Vehicle Speed Sensor (VSS) Input
18	RD/YE	Overdrive (OD) Cut Signal, with Cruise Control
19	GN/WH	Brake Switch Signal
20	YE	AC Request Signal
21-22	-	Not Used
23	WH	Heated Oxygen Sensor (HO2S) 2 Input
24-31	-	Not Used
32	BK/BU	Evaporator Temperature Sensor Input
33	GN/WH	AC On Signal
34-35	-	Not Used

Back View of PCM Connector C4

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		31-Pin WH
Pin	Wire Color	Function
1	BK	Ignition Positive Voltage
2	-	Not Used
3	RD/WH	Battery Voltage
4-6	-	Not Used
7	PK/BK	Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control
8	-	Not Used
9	BK/OG	Ignition Positive Voltage
10	RD/YE	Engine Speed Output
11	RD/YE	MIL Control
12	GN	Electrical Load Idle-Up Signal, Tail Lamps
13	WH	Electrical Load Idle-Up Signal, Rear Defogger
14	YE	Supplemental Inflatable Restraint (SIR) System Signal
15-18	-	Not Used
19	PK	BPMV Serial Data
20	PK/BK	Diagnostic Request Circuit
21	BU	Fuel Tank Pressure (FTP) Sensor Input
22-31	-	Not Used