Powertrain Control Module (PCM) Connector End Views

WARNING: This page is about a different variant/trim than selected.

Powertrain Control Module (PCM) - C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191489 80-Way F Micro-Pack 100W Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1	BK/WH	451	Ground
2	L-GN	1867	12-Volt Reference
3	-	-	Not Used
4	L-BU/ BK	844	Fuel Injector 4 Control
5-6	-	-	Not Used
7	GY	2705	5-Volt Reference
8	GY	2701	5-Volt Reference
9	D-BU	496	Knock Sensor Signal
10-11	-	-	Not Used
12	D-BU/ WH	1869	CKP Sensor Signal
13-16	-	-	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	OG	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
30-31	-	-	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	GY	48	CPP Switch Signal
36	BK	1744	Fuel Injector 1 Control
37	PK/BK	1746	Fuel Injector 3 Control
38	-	-	Not Used
39	YE/BK	625	Starter Enable Relay Control
40	BK/WH	451	Ground
41	-	-	Not Used
42	D-GN	335	Low Speed Cooling Fan Relay Control
43	BK/WH	845	Fuel Injector 5 Control
44	-	-	Not Used
45	GY	2700	5-Volt Reference
46	GY	474	5-Volt Reference
47	-	-	Not Used
48	GY	597	5-Volt Reference
49	GY	1716	Low Reference
50-52	-	-	Not Used
53	BK	720	Low Reference
54	OG/BK	469	Low Reference
55-56	-	-	Not Used
57	OG	440	Battery Positive Voltage
58	DK GN	1049	Class 2 Serial Data
59	-	-	Not Used
60	BK	2752	Low Reference
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
70-71	-	-	Not Used
72	YE	772	Transmission Range Switch Signal B
73	BN/WH	633	CMP Sensor Signal
74	YE	410	ECT Sensor Signal
75	PK	1020	Ignition 0 Voltage
76	L-GN/ BK	1745	Fuel Injector 2 Control
77	YE/BK	846	Fuel Injector 6 Control
78	-	-	Not Used
79	WH	687	3-2 Shift Solenoid Valve Control
80	BK	407	Low Reference

Powertrain Control Module (PCM) - C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12191488 80-Way F Micro-Pack 100W Sealed (RD)
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
7	-	-	Not Used
8	L-BU/ WH	1229	PC Solenoid Valve Low Control
9	D-GN/ WH	465	Fuel Pump Relay Control
10	WH	121	Engine Speed Signal
11-12	-	-	Not Used
13	L-BU/ BK	396	Cruise Control Engaged Signal
14	RD/BK	380	A/C Refrigerant Pressure Sensor Signal
15	PU	5428	Generator Regulator Control
16	GY/BK	1694	4WD Low Signal
17	-	-	Not Used
18	D-GN	1433	Clutch Start Switch Signal
19	BK/WH	1695	Axle Switch Signal
20	L-GN/ BK	822	VSS Low Signal
21	PU/WH	821	VSS High Signal
22-23	-	-	Not Used
24	D-BU	417	TP Sensor Signal
25	TN	472	IAT Sensor Signal
26	WH	423	IC Timing Control
27-30	-	-	Not Used
31	YE	492	MAF Sensor Signal
32	L-GN	432	MAP Sensor Signal
33	D-BU	473	High Speed Cooling Fan Relay 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	-	-	Not Used
42	TN/BK	422	TCC Solenoid Valve Control
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 Valve Control
48	L-GN	1222	1-2 Shift Solenoid 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/WH	1589	Fuel Level Sensor Signal
55-56	-	-	Not Used
57	BK	552	Low Reference
58	TN/WH	332	Oil Pressure Sensor Signal
59	PU	806	Crank Voltage
60-61	-	-	Not Used
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
65-71	-	-	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	L-GN/ WH	1749	IAC Coil B High Control
77	L-GN/ BK	444	IAC Coil B Low Control
78	L-BU/ BK	1748	IAC Coil A Low Control
79	L-BU/ WH	1747	IAC Coil A High Control
80	BK	2751	Low Reference