Powertrain Control Module (PCM) Connector End Views

Powertrain Control Module (PCM) C1 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357147 56-Way F Micro 64 Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1-5	-	-	Not Used
6	D-GN/WH	459	A/C Compressor Clutch Relay Control
7	BN	1271	Low Reference
8	PU	1272	Low Reference
9	-	-	Not Used
10	D-BU	473	High Speed Cooling Fan Relay Control
11	-	-	Not Used
12	PU	1589	Fuel Level Sensor Signal - Primary
13	PK/BK	5290	Ignition 1 Voltage
14	L-BU	6118	IAT 2 Sensor Signal
15	PU	1807	ECM Class 2 Serial Data
16	PU	1807	ECM Class 2 Serial Data
17	GY	2700	5-Volt Reference
18	BN	4	Accessory Voltage
19	YE	1139	Ignition 1 Voltage
20	OG	480	Load Management Control
21	-	-	Not Used
22	WH	1310	EVAP Canister Vent Solenoid Control
23	-	-	Not Used
24	D-GN	890	Fuel Tank Pressure Sensor Signal
25	-	-	Not Used
26	RD/BK	380	A/C Refrigerant Pressure Sensor Signal
27	D-BU	1161	APP Sensor 1 Signal
28	-	-	Not Used
29	BK	2759	Low Reference
30	WH/BK	1164	5-Volt Reference
31	-	-	Not Used
32	L-BU	20	Stop Lamp Supply Voltage/Stop Lamp Switch Signal
33	-	-	Not Used
34	PK	2014	Coolant Pump Relay Control
35-36	-	-	Not Used
37	D-GN/WH	465	Fuel Pump Relay Control - Primary
38	BN	5069	Main Relay Control
39	-	-	Not Used
40	BN/WH	419	MIL Control
41	L-BU	1162	APP Sensor 2 Signal
42	-	-	Not Used
43	TN	1274	5-Volt Reference
44	GY	1884	Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45	-	-	Not Used
46	PU	420	TCC Brake Switch/Cruise Control Release Signal
47	GY	705	5-Volt Reference
48	YE	447	Starter Relay Coil Control
49-50	-	-	Not Used
51	D-GN	335	Low Speed Cooling Fan Relay Control
52	-	-	Not Used
53	BN/WH	379	CPP Switch Signal
54	D-GN	1433	PNP/Clutch Start Switch Signal
55	-	-	Not Used
56	BK	2751	Low Reference

Powertrain Control Module (PCM) C2 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357131 73-Way F GT 280 Micro 64 Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	RD	225	Generator Turn On Signal
2	D-GN	485	TP Sensor 1 Signal
3	-	-	Not Used
4	GY	596	5-Volt Reference
5	GY	2704	5-Volt Reference
6	GY	2701	A/C Refrigerant Pressure Sensor Signal (C60)
7	PU	486	TP Sensor 2 Signal
8	D-GN	6291	5-Volt Reference
9	L-BU/BK	1688	5-Volt Reference
10-15	-	-	Not Used
16	PU	6413	Low Reference
17	YE	573	CKP Sensor 1 Signal
18	PU	574	Low Reference
19	-	-	Not Used
20	D-GN/WH	6292	Low Reference
21	PK/BK	632	Low Reference
22-24	-	-	Not Used
25	TN/WH	1669	HO2S Low Signal Bank 1 Sensor X
26	BN/WH	633	Camshaft Position Signal
27-28	-	-	Not Used
29	GY	1724	Boost Control Solenoid Control
30	OG/BK	469	Low Reference
31	-	-	Not Used
32	TN	1667	HO2S Low Signal Bank 2 Sensor 1
33	BK	1744	Fuel Injector 1 Control
34	-	-	Not Used
35	YE	410	ECT Sensor Signal
36	BK/WH	1704	Low Reference
37	GY	6337	MAP Sensor Signal
38	L-GN	432	SCIP Sensor Signal
39	BK	2752	Low Reference
40	BN/WH	6405	IC 1 Signal
41	YE	492	MAF Sensor Signal
42	D-GN/WH	6407	IC 4 Signal
43	BK/WH	1423	HO2S Heater Low Control Bank 1 Sensor 2
44	-	-	Not Used
45	GY	23	Generator Field Duty Cycle Signal
46	PU/WH	1668	HO2S High Signal Bank 1 Sensor X
47	-	-	Not Used
48	PU	1666	HO2S High Signal Bank 2 Sensor 1
49-50	-	-	Not Used
51	TN	472	IAT Sensor Signal
52	BK	2761	Low Reference
53	L-GN/BK	1745	Fuel Injector 2 Control
54	L-BU/BK	844	Fuel Injector 4 Control
55	PK/BK	1746	Fuel Injector 3 Control
56-57	-	-	Not Used
58	D-GN	676	HO2S Heater High Control Bank 1 Sensor 1
59	D-BU/WH	6406	IC 3 Signal
60	L-BU/WH	6408	IC 2 Signal
61-63	-	-	Not Used
64	BK	2760	Low Reference
65	BN	582	TAC Motor Control 2
66	YE	581	TAC Motor Control 1
67	-	-	Not Used
68	D-BU	496	Knock Sensor 1 Signal
69	GY	1716	Low Reference
70-72	-	-	Not Used
73	BK/WH	451	Ground

Powertrain Control Module (PCM) C3 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357148 56-Way F Micro 64 Sealed (GY)
Pin	Wire Color	Circuit No.	Function
1-14	-	-	Not Used
15	TN/BK	231	Oil Pressure Switch Signal
16-21	-	-	Not Used
22	WH/BK	2932	5-Volt Reference
23-30	-	-	Not Used
31	GY/BK	433	BARO Sensor Signal
32-35	-	-	Not Used
36	OG/BK	6014	Low Reference
37	D-GN/WH	428	EVAP Canister Purge Solenoid Control
38-43	-	-	Not Used
44	PU	401	Signal Low - Front/VSS Low Signal/OSS Low Signal
45	YE	400	Signal High - Front/VSS High Signal/OSS High Signal
46-56	-	-	Not Used