Powertrain Control Module (PCM) Connector End Views

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) - C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		80-Way F Micro-Pack 100W Sealed Assembly - 12191489 Does not include the following: TPA (BU) 12176408 Terminal - 12084912
Pin	Wire Color	Circuit No.	Function
1	BK/WH	451	Ground
2	L-GN	1867	12-Volt Reference
3	PK/BK	1746	Fuel Injector 3 Control
4	L-GN/BK	1745	Fuel Injector 2 Control
5-6	-	-	Not Used
7	GY	2705	5-Volt Reference
8-10	-	-	Not Used
11	L-BU	1876	Knock Sensor 2 Signal
12	D-BU/WH	1869	CKP Sensor Signal
13	-	-	Not Used
14	OR/BK	1061	UART Serial Data
15	D-BU/WH	774	UART Serial Data
16	-	-	Not Used
17	D-BU	1225	Transmission Fluid Pressure Switch Signal B
18	RD	1226	Transmission Fluid Pressure Switch Signal C
19	PK	439	Ignition 1 Voltage
20	OR	440	Battery Positive Voltage
21	YE/BK	1868	Low Reference
22	-	-	Not Used
23	BK	470	Low Reference
24	BK/WH	451	Ground
25	TN	1671	HO2S Low Signal - Bank 2 Sensor 2
26	TN	1667	HO2S Low Signal - Bank 2 Sensor 1
27	BK/WH	451	Ground
28	TN/WH	1669	HO2S Low Signal - Bank 1 Sensor 2
29	TN	1664	HO2S Low Signal - Bank 1 Sensor 1
30	L-GN	1478	Coolant Level Switch Signal
31	-	-	Not Used
32	BK/WH	771	Transmission Range Switch Signal A
33	PU	420	TCC Brake Switch/Cruise Control Release Signal
34	WH	776	Transmission Range Switch Signal P
35	-	-	Not Used
36	BK	1744	Fuel Injector 1 Control
37	YE/BK	846	Fuel Injector 6 Control
38	RD	2531	Alternative Fuel Operation (AFO) Enable
39	YE/BK	625	Starter Enable Relay Control
40	BK/WH	451	Ground
41	-	-	Not Used
42	D-BU	313	Low Pressure Lock-Off (LPL) Control
43	RD/BK	877	Fuel Injector 7 Control
44	L-BU/BK	844	Fuel Injector 4 Control
45	GY	2700	5-Volt Reference
46	GY	474	5-Volt Reference
47	-	-	Not Used
48	GY	597	5-Volt Reference
49-50	-	-	Not Used
51	D-BU	496	Knock Sensor 1 Signal
52	-	-	Not Used
53	GY	720	Low Reference
54	OR/BK	469	Low Reference
55	-	-	Not Used
56	WH	790	Fuel Injection Control Module Status
57	OR	440	Battery Positive Voltage
58	D-GN	1049	Class 2 Serial Data
59	YE	710	Class 2 Serial Data
60	-	-	Not Used
61	PK/BK	632	Low Reference
62	-	-	Not Used
63	BK	2755	Low Reference
64	BK/WH	451	Ground
65	PU	1670	HO2S High Signal - Bank 2 Sensor 2
66	PU	1666	HO2S High Signal - Bank 2 Sensor 1
67	BK/WH	451	Ground
68	PU/WH	1668	HO2S High Signal - Bank 1 Sensor 2
69	PU/WH	1665	HO2S High Signal - Bank 1 Sensor 1
70	BN	1174	Oil Level Switch Signal
71	PU/WH	455	Fuel Gage Select Signal
72	YE	772	Transmission Range Switch Signal B
73	BN/WH	633	CMP Sensor Signal
74	YE	410	ECT Sensor Signal
75	PK	1020	Off/Run/Crank Voltage
76	BK/WH	845	Fuel Injector 5 Control
77	D-BU/WH	878	Fuel Injector 8 Control
78-79	-	-	Not Used
80	BK	407	Low Reference

Powertrain Control Module (PCM) - C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		80-Way F Micro-Pack 100W Sealed Assembly - 12191488 Does not include the following: TPA (GN) - 15358857 Terminal - 12084912
Pin	Wire Color	Circuit No.	Function
1	BK/WH	451	Ground
2	BN	418	TCC PWM Solenoid Valve Control
3-5	-	-	Not Used
6	RD/BK	1228	PC Solenoid Valve High Control (Sol A)
7	-	-	Not Used
8	L-BU/WH	1229	PC Solenoid Valve Low Control (Sol A)
9	D-GN/WH	465	Fuel Pump Relay Control - Primary
10	WH	121	Engine Speed Signal
11-13	-	-	Not Used
14	RD/BK	380	A/C Refrigerant Pressure Sensor Signal
15	BR	25	Charge Indicator Control
16	GY/BK	1694	4WD Low Signal
17-18	-	-	Not Used
19	BK/WH	1695	Axle Switch Signal
20	L-GN/BK	822	VSS Low Signal
21	PU/WH	821	VSS High Signal
22	RD/BK	1230	AT ISS High Signal
23	D-BU/WH	1231	AT ISS Low Signal
24	D-BU	2670	Fuel Rail Pressure PWM Signal
25	TN	472	IAT Sensor Signal
26	PU	2121	IC 1 Control
27	RD	2127	IC 7 Control
28	L-BU/WH	2126	IC 6 Control
29	D-GN/WH	2124	IC 4 Control
30	PK/BK	462	Fuel Injector Control Module Status
31	YE	492	MAF Sensor Signal
32	L-GN	432	MAP Sensor Signal
33	L-BU/BK	1580	High Pressure Lock-Off (HPL) Control
34	D-GN/WH	428	EVAP Canister Purge Solenoid Control
35-38	-	-	Not Used
39	RD	631	12-Volt Reference
40	BK/WH	451	Ground
41-42	-	-	Not Used
43	D-GN/WH	459	A/C Compressor Clutch Relay Control
44	-	-	Not Used
45	WH	1310	EVAP Canister Vent Solenoid Control
46	BN/WH	419	MIL Control
47	YE/BK	1223	(2-3 Shift Solenoid or Shift Solenoid B) Valve Control
48	L-GN	1222	(1-2 Shift Solenoid or Shift Solenoid A) Valve Control
49	YE/BK	1827	Vehicle Speed Signal
50	D-GN/WH	817	Vehicle Speed Signal
51	YE/BK	1227	TFT Sensor Signal
52	BN	2391	HO2S Heater Low Control - Bank 1 Sensor 2
53	RD/WH	3223	HO2S Heater Low Control - Bank 2 Sensor 2
54	PU	1589	Fuel Level Sensor Signal - Primary
55- 56	-	-	Not Used
57	BK	552	Low Reference
58	TN/WH	332	Oil Pressure Sensor Signal
59	PU	806	Crank Voltage
60	BN	2129	Low Reference
61	BN/WH	2130	Low Reference
62	GY	773	Transmission Range Switch Signal C
63	PK	1224	Transmission Fluid Pressure Switch Signal A
64	D-GN	890	Fuel Tank Pressure Sensor Signal
65	-	-	Not Used
66	PU/WH	2128	IC 8 Control
67	RD/WH	2122	IC 2 Control
68	D-GN	2125	IC 5 Control
69	L-BU	2123	IC 3 Control
70-71	-	-	Not Used
72	BK/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1
73	-	-	Not Used
74	L-GN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
75	GY	23	Generator Field Duty Cycle Signal
76-79	-	-	Not Used
80	BK	2751	Low Reference