Back View of the PCM Connector End View C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		34-Pin WHT
Pin	Wire Color	Function
1	YEL	Fuel Injector 1 Control
2	BLK	Fuel Injector 2 Control
3	WHT	Fuel Injector 3 Control
4	BLU	Fuel Injector 4 Control
5	BLK/BLU	Idle Air Control (IAC) Valve Control
6	WHT/BLK	Ground
7	WHT/BLK	Ground
8	RED/BLU	Ignition Trigger Signal Coil 1
9	YEL/GRN	Ignition Trigger Signal Coil 2
10	GRY	Ignition Trigger Signal Coil 3
11	WHT	Ignition Trigger Signal Coil 4
12	BLU/BLK	EVAP Canister Purge Solenoid Valve Control
13	YEL	AC Pressure Switch
14	BLK/YEL	Camshaft Position (CMP) Actuator Solenoid Valve High Control
15	YEL	Camshaft Position (CMP) Actuator Solenoid Valve Control Low
16	PNK	Line Pressure Control (PC) Solenoid Control Low*
17	RED/WHT	Line Pressure Control (PC) Solenoid Control High*
18	YEL	5-Volt Reference Circuit
19	WHT	Engine Coolant Temperature (ECT) Sensor Input
20	YEL/BLK	Intake Air Temperature (IAT) Sensor Input
21	LT GRN	Throttle Position (TP) Sensor Input
22	-	Not Used
23	BLU/YEL	Ignition Fail Safe Input
24	BLU/YEL	Rocker Arm Oil Control Solenoid Valve Control High
25	BLK	Rocker Arm Oil Control Solenoid Valve Control Low
26	BLK	Camshaft Position (CMP) Sensor Input
27	BLK	Crankshaft Position (CKP) Sensor Input
28	BRN	Sensor Ground
29	-	Not Used
30	LT GRN	Secondary AIR Injection Pressure Sensor Input
31-32	-	Not Used
33	BLK/BLU	Secondary AIR Injection Solenoid Valve Control
34	WHT	CMP Sensor and CKP Sensor Ground