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) Terminal Identification - C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191489 80-Way F Micro-Pack 100W Sealed (BLU)
Pin	Wire Color	Circuit No.	Function
1	BLK/WHT	451	Ground
2	LT GRN	1867	12 Volt Reference
3	-	-	Not Used
4	LT BLU/ BLK	844	Fuel Injector 4 Control
5-6	-	-	Not Used
7	GRY	2705	5 Volt Reference
8	GRY	2701	5 Volt Reference
9	DK BLU	496	Knock Sensor Signal
10-11	-	-	Not Used
12	DK BLU/ WHT	1869	CKP Sensor Signal
13	ORN/BLK	463	Requested Torque Signal
14-16	-	-	Not Used
17	DK BLU	1225	Transmission Fluid Pressure Switch Signal B
18	RED	1226	Transmission Fluid Pressure Switch Signal C
19	PNK	439	Ignition 1 Voltage
20	ORN	440	Battery Positive Voltage
21	YEL/BLK	1868	Low Reference
22	-	-	Not Used
23	BLK	470	Low Reference
24	BLK/WHT	451	Ground
25	TAN	1671	HO2S Low Signal Bank 2 Sensor 2
26	TAN	1667	HO2S Low Signal Bank 2 Sensor 1
27	BLK/WHT	451	Ground
28	TAN/WHT	1669	HO2S Low Signal Bank 1 Sensor 2
29	TAN	1664	HO2S Low Signal Bank 1 Sensor 1
30	LT GRN	1478	Coolant Level Switch Signal
31	-	-	Not Used
32	BLK/WHT	771	Transmission Range Switch Signal A
33	PPL	420	TCC Brake Switch/Cruise Control Release Signal
34	WHT	776	Transmission Range Switch Signal P
35	GRY	48	CPP Switch Signal
36	BLK	1744	Fuel Injector 1 Control
37	PNK/BLK	1746	Fuel Injector 3 Control
38	-	-	Not Used
39	YEL/BLK	625	Starter Enable Relay Control
40	BLK/WHT	451	Ground
41-42	-	-	Not Used
43	BLK/WHT	845	Fuel Injector 5 Control
44	-	-	Not Used
45	GRY	2700	5 Volt Reference
46	GRY	474	5 Volt Reference
47	-	-	Not Used
48	GRY	597	5 Volt Reference
49	GRY	1716	Low Reference
50-52	-	-	Not Used
53	BLK	720	Low Reference
54	ORN/BLK	469	Low Reference
55-56	-	-	Not Used
57	ORN	440	Battery Positive Voltage
58	DK GRN	1049	PCM Class 2 Serial Data
59	YEL	710	Class 2 Serial Data
60	ORN/BLK	510	Low Reference
61	PNK/BLK	632	Low Reference
62	-	-	Not Used
63	BLK	2755	Low Reference
64	BLK/WHT	451	Ground
65	PPL	1670	HO2S High Signal Bank 2 Sensor 2
66	PPL	1666	HO2S High Signal Bank 2 Sensor 1
67	BLK/WHT	451	Ground
68	PPL/WHT	1668	HO2S High Signal Bank 1 Sensor 2
69	PPL/WHT	1665	HO2S High Signal Bank 1 Sensor 1
70	BRN	1174	Oil Level Switch Signal
71	-	-	Not Used
72	YEL	772	Transmission Range Switch Signal B
73	BRN/WHT	633	CMP Sensor Signal
74	YEL	410	ECT Sensor Signal
75	PNK	1020	Off/Run/Crank Voltage
76	LT GRN/ BLK	1745	Fuel Injector 2 Control
77	YEL/BLK	846	Fuel Injector 6 Control
78	-	-	Not Used
79	WHT	687	3-2 Shift Solenoid Valve Control
80	GRY	407	Low Reference

Powertrain Control Module (PCM) Terminal Identification - C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191488 80-Way F Micro-Pack 100W Sealed (RED)
Pin	Wire Color	Circuit No.	Function
1	BLK/WHT	451	Ground
2	BRN	418	TCC PWM Solenoid Valve Control
3-4	-	-	Not Used
5	TAN/BLK	464	Delivered Torque Signal
6	RED/BLK	1228	PC Solenoid Valve High Control
7	-	-	Not Used
8	LT BLU/ WHT	1229	PC Solenoid Valve Low Control
9	DK GRN/ WHT	465	Fuel Pump Relay Control
10	WHT	121	Engine Speed Signal
11-12	-	-	Not Used
13	LT BLU/ BLK	396	Cruise Control Engaged Signal
14	RED/BLK	380	A/C Refrigerant Pressure Sensor Signal
15	BRN	25	Charge Indicator Control
16	GRY/BLK	1694	4WD Low Signal
17	-	-	Not Used
18	DK GRN	1433	Clutch Start Switch Signal
19	BLK/WHT	1695	Axle Switch Signal
20	LT GRN/ BLK	822	VSS Low Signal
21	PPL/WHT	821	VSS High Signal
22-23	-	-	Not Used
24	DK BLU	417	TP Sensor Signal
25	TAN	472	IAT Sensor Signal
26	WHT	423	IC Timing Control
27-30	-	-	Not Used
31	YEL	492	MAF Sensor Signal
32	LT GRN	432	MAP Sensor Signal
33	-	-	Not Used
34	DK GRN/ WHT	428	EVAP Canister Purge Solenoid Control
35-38	-	-	Not Used
39	RED	631	12 Volt Reference
40	BLK/WHT	451	Ground
41	-	-	Not Used
42	TAN/BLK	422	TCC Solenoid Valve Control
43	DK GRN/ WHT	459	A/C Compressor Clutch Relay Control
44	-	-	Not Used
45	WHT	1310	EVAP Canister Vent Solenoid Control
46	BRN/WHT	419	MIL Control
47	YEL/BLK	1223	2-3 Shift Solenoid Valve Control
48	LT GRN	1222	1-2 Shift Solenoid Valve Control
49	YEL/BLK	1827	Vehicle Speed Signal
50	DK GRN/ WHT	817	Vehicle Speed Signal
51	YEL/BLK	1227	TFT Sensor Signal
52	BRN	2391	HO2S Heater Low Control - Bank 1 Sensor 2
53	RED/WHT	3223	HO2S Heater Low Control - Bank 2 Sensor 2
54	PPL/WHT	1589	Fuel Level Sensor Signal
55-56	-	-	Not Used
57	BLK	552	Low Reference
58	TAN/WHT	332	Oil Pressure Sensor Signal
59	PPL	806	Crank Voltage
60-61	-	-	Not Used
62	GRY	773	Transmission Range Switch Signal C
63	PNK	1224	Transmission Fluid Pressure Switch Signal A
64	DK GRN	890	Fuel Tank Pressure Sensor Signal
65-71	-	-	Not Used
72	BLK/WHT	3113	HO2S Heater Low Control - Bank 1 Sensor 1
73	-	-	Not Used
74	LT GRN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
75	GRY	23	Generator Field Duty Cycle Signal
76	LT GRN/ WHT	1749	IAC Coil B High Control
77	LT GRN/ BLK	444	IAC Coil B Low Control
78	LT BLU/ BLK	1748	IAC Coil A Low Control
79	LT BLU/ WHT	1747	IAC Coil A High Control
80	BLK	2751	Low Reference