Powertrain Control Module (PCM) Connector End Views

Powertrain Control Module (PCM) C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15430208 56-Way F Micro-Pack 64 Series Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1	TN/BK	2500	High Speed GMLAN Serial Data Bus +
2	TN	2501	High Speed GMLAN Serial Data Bus -
3	-	-	Not Used
4	GY	2700	5-Volt Reference
5	-	-	Not Used
6	BN/WH	419	MIL Control
7	TN	5514	Low Reference
8	OG/BK	1057	Low Reference
9	-	-	Not Used
10	WH	1310	EVAP Canister Vent Solenoid Control
11	-	-	Not Used
12	OG/BK	1057	Low Reference
13-14	-	-	Not Used
15	PU	1807	Class 2 Serial Data
16-17	-	-	Not Used
18	BN	4	Accessory Voltage
19	PK	639	Ignition 1 Voltage
20	RD/WH	540	Battery Positive Voltage
21	-	-	Not Used
22	BN	818	Vehicle Speed Signal
23	YE	447	Starter Relay Coil Control
24	BN	5069	Main Relay Control
25	-	-	Not Used
26	D-GN	890	Fuel Tank Pressure Sensor Signal
27-30	-	-	Not Used
31	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
32	WH	17	Stop Lamp Switch Signal
33	D-GN/WH	459	A/C Compressor Clutch Relay Control
34-36	-	-	Not Used
37	D-GN/WH	465	Fuel Pump Relay Control
38-42	-	-	Not Used
43	PU	1589	Fuel Level Sensor Signal
44	-	-	Not Used
45	PU	5526	Tap Up/Tap Down Switch Signal
46-47	-	-	Not Used
48	D-GN	335	Low Speed Cooling Fan Relay Control
49	-	-	Not Used
50	D-BU	473	High Speed Cooling Fan Relay Control
51-52	-	-	Not Used
53	GY	705	5-Volt Reference A
54-56	-	-	Not Used

Powertrain Control Module (PCM) C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15430226 73-Way F Micro-Pack 64 Series Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	BN	1456	EGR Valve Position Signal
2	OG/BK	1061	UART Serial Data (Secondary)
3	TN	800	UART Serial Data (Primary)
4	PK/BK	1746	Fuel Injector 3 Control
5	TN	1744	Fuel Injector 1 Control
6	L-GN/BK	1745	Fuel Injector 2 Control
7	TN/WH	845	Fuel Injector 5 Control
8	TN	2753	Low Reference
9	YE/BK	846	Fuel Injector 6 Control
10	L-BU/BK	844	Fuel Injector 4 Control
11	OG/WH	2122	IC 2 Control
12	GY/WH	3113	HO2S Heater Low Control (Bank 1 Sensor 1)
13	OG	1676	EGR Solenoid High Control
14	-	-	Not Used
15	PU	574	Low Reference
16	GY	435	EGR Solenoid Low Control
17	-	-	Not Used
18	L-GN	432	MAP Sensor Signal
19-20	-	-	Not Used
21	OG	631	12-Volt Reference
22	L-GN	1867	12-Volt Reference
23-24	-	-	Not Used
25	TN/WH	3211	HO2S Low Reference (Bank 2 Sensor 1)
26	BN/WH	633	CMP Sensor Signal
27	L-BU/BK	647	Medium Resolution Engine Speed Signal
28-29	-	-	Not Used
30	OG/BK	469	Low Reference
31	-	-	Not Used
32	PK/BK	632	Low Reference
33	GY	5047	5-Volt Reference
34	GY	2704	5-Volt Reference A
35	-	-	Not Used
36	GY	2303	Low Reference
37	YE	2174	Low Reference
38	D-BU	496	Knock Sensor 1 Signal
39	GY/BK	1798	Drain Wire
40	GY	1716	Low Reference
41	D-GN/WH	428	EVAP Canister Purge Solenoid Control
42-46	-	-	Not Used
47	TN/WH	3111	HO2S Low Reference (Bank 1 Sensor 1)
48	PU/WH	3110	HO2S Reference Voltage (Bank 1 Sensor 1)
49-52	-	-	Not Used
53	OG	225	Generator Turn On Signal
54	L-BU	1876	Knock Sensor 2 Signal
55	YE	410	ECT Sensor Signal
56	OG/BK	645	Drain Wire
57	TN/BK	231	Oil Pressure Switch Signal
58-59	-	-	Not Used
60	PU/WH	3210	HO2S Reference Voltage (Bank 2 Sensor 1)
61	PU	2121	IC 1 Control
62	L-GN	3212	HO2S Heater Low Control (Bank 2 Sensor 1)
63	L-BU	2123	IC 3 Control
64-72	-	-	Not Used
73	BK/WH	451	Ground

Powertrain Control Module (PCM) C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15430211 56-Way F Micro-Pack 64 Series Sealed (GY)
Pin	Wire Color	Circuit No.	Function
1-2	-	-	Not Used
3	TN	3221	HO2S Low Signal (Bank 2 Sensor 2)
4	TN/WH	3121	HO2S Low Signal (Bank 1 Sensor 2)
5	YE/BK	1227	TFT Sensor Signal
6	YE	492	MAF Sensor Signal
7	-	-	Not Used
8	GY/WH	3122	HO2S Heater Low Control (Bank 1 Sensor 2)
9	-	-	Not Used
10	OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
11	OG/BK	1230	A/T ISS High Signal
12	YE	400	VSS High Signal
13-14	-	-	Not Used
15	GY	773	Transmission Range Switch Signal C
16-17	-	-	Not Used
18	PU	3220	HO2S High Signal (Bank 2 Sensor 2)
19	PU	3120	HO2S High Signal (Bank 1 Sensor 2)
20-21	-	-	Not Used
22	YE	772	Transmission Range Switch Signal B
23	WH	776	Transmission Range Switch Signal P
24	YE	657	TCC Release Switch Signal
25	-	-	Not Used
26	TN	472	IAT Sensor Signal
27-28	-	-	Not Used
29	D-BU	1225	Transmission Fluid Pressure Switch Signal B
30	OG	1226	Transmission Fluid Pressure Switch Signal C
31-32	-	-	Not Used
33	L-GN	1222	1-2 Shift Solenoid Valve Control
34	TN/WH	771	Transmission Range Switch Signal A
35-38	-	-	Not Used
39	BN	418	TCC PWM Solenoid Valve Control
40-43	-	-	Not Used
44	PU	401	VSS Low Signal
45	-	-	Not Used
46	YE/BK	1223	2-3 Shift Solenoid Valve Control
47	OG/BK	1228	PC Solenoid Valve High Control (Sol. A)
48	TN	2762	Low Reference
49	D-BU/WH	1231	A/T ISS Low Signal
50	TN/BK	2760	Low Reference
51	L-BU/WH	1229	PC Solenoid Valve Low Control (Sol. A)
52-56	-	-	Not Used