Powertrain Control Module (PCM) Connectors

WARNING: This page is about a different car, the 2004 GMC Safari and 2004 Chevrolet Astro. 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			12191110 80-Way F Micro-Pack 100 Series (BLU)
Pin	Wire Color	Circuit No.	Function
1	TAN/WHT	551	Ground
2	LT GRN	1867	12 Volt Reference
3	-	-	Not Used
4	LT BLU/BLK	844	Fuel Injector 4 Control
5-7	-	-	Not Used
8	BLK	2701	5 Volt Reference
9	DK BLU	496	KS (1) Signal
10-11	-	-	Not Used
12	YEL	573	CKP Sensor (1) Signal
13-16	-	-	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	PPL	574	Low Reference
22	-	-	Not Used
23	BLK	470	Low Reference
24	TAN/WHT	551	Ground
25	-	-	Not Used
26	TAN	1667	HO2S Bank 2 Sensor 1 Low Reference
27	TAN/WHT	551	Ground
28	TAN/WHT	1669	HO2S Bank 1 Sensor 2 Low Reference
29	TAN	1664	HO2S Bank 1 Sensor 1 Low Reference
30-31	-	-	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	-	-	Not Used
36	BLK	1744	Fuel Injector 1 Control
37	PNK/BLK	1746	Fuel Injector 3 Control
38-39	-	-	Not Used
40	TAN/WHT	551	Ground
41-42	-	-	Not Used
43	BLK/WHT	845	Fuel Injector 5 Control
44-45	-	-	Not Used
46	GRY	474	5 Volt Reference
47	-	-	Not Used
48	GRY	2704	5 Volt Reference
49	GRY	1716	Knock Sensor Return
50-52	-	-	Not Used
53	BLK	2762	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	BLK	2752	Low Reference
61	PNK/BLK	632	Low Reference
62-63	-	-	Not Used
64	TAN/WHT	551	Ground
65	-	-	Not Used
66	PPL	1666	HO2S Bank 2 Sensor 1 High Signal
67	-	-	Not Used
68	PPL/WHT	1668	HO2S Bank 1 Sensor 2 High Signal
69	PPL/WHT	1665	HO2S Bank 1 Sensor 1 High Signal
70-71	-	-	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	BLK	2761	Low Reference

Powertrain Control Module (PCM) C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information			12191110 80-Way F Micro-Pack 100 Series (GRN)
Pin	Wire Color	Circuit No.	Function
1	TAN/WHT	551	Ground
2	BRN	418	TCC PWM Solenoid Valve Control
3-5	-	-	Not Used
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
10-12	-	-	Not Used
13	LT BLU/BLK	396	Cruise Control Engaged Signal
14	-	-	Not Used
15	BRN	25	Charge Indicator Control
16	-	-	Not Used
17	DK GRN/WHT	762	A/C Request Signal
18-19	-	-	Not Used
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	TAN/WHT	551	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	-	-	Not Used
54	PPL/WHT	1589	Fuel Level Sensor Signal
55	DK GRN	603	A/C Low Pressure Switch Signal
56	-	-	Not Used
57	BLK	2760	Low Reference
58-61	-	-	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	53	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	-	-	Not Used