Back View of PCM Connector End View 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 Control Low
15	BU/WH	Auxiliary Intake Air Control Solenoid Control
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
22-23	-	Not Used
24	BU/YE	Ignition Fail Safe Input
25	RD	EVAP Canister Vent Solenoid Valve Control
26	BK	Camshaft Position (CMP) Sensor Input
27	BK	Crankshaft Position (CKP) Sensor Input
28	BN	Sensor Ground
29	BU/WH	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