PCM Connector C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information			15357131 (early) 15430229 (late) 73-Way F Micro 64 (BLK)
Pin	Wire Color	Circuit No.	Function
1	BRN	1174	Oil Level Switch Signal
2	RED	1676	EGR Solenoid High Control
3	PPL/WHT	421	Rear AIR Pump Relay Control
4	-	-	Not Used
5	TAN/WHT	3111	HO2S Low Signal (Bank 1 Sensor 1)
6	GRY (Early) GRY/WHT (late)	2702	5-Volt Reference
7	-	-	Not Used
8	GRY	2701	5-Volt Reference
9	GRY	435	EGR Solenoid Low Control or EGR Solenoid Control
10	RED	225	Generator Turn On Signal
11	LT BLU	1876	Knock Sensor 2 Signal
12	GRY	23	Generator Field Duty Cycle Signal
13	GRY	1716	Knock Sensor 1 (KS1) Low Reference
14	-	-	Not Used
15	PPL	3120	HO2S High Signal (Bank 1 Sensor 2)
16	BRN	1456	EGR Valve Position Signal
17	LT GRN/WHT	1749	IAC Coil B High Control
18	YEL	410	ECT Sensor Signal
19	DK BLU	496	Knock Sensor 1 Signal
20	TAN/WHT	3121	HO2S Low Signal (Bank 1 Sensor 2)
21	PNK/BLK	632	Low Reference
22	DK BLU	417	TP Sensor Signal
23	PPL	2121	IC 1 Control
24	LT BLU/WHT	2126	IC 6 Control
25	ORN	1799	High Resolution Signal
26	-	-	Not Used
27	GRY	2303	Low Reference Knock Sensor 2 (KS2)
28	YEL/BLK	573	Crank Sensor B Signal
29	PPL/WHT	3110	HO2S High Signal (Bank 1 Sensor 1)
30	GRY	2704	5-Volt Reference (MAP)
31	LT BLU/WHT	1800	Crank Sensor A Signal
32	-	-	Not Used
33	BLK	2761	Low Reference (Coolant Sensor)
34	RED	2127	IC 7 Control
35	BLK	2753	Low Reference (EGR)
36	ORN/BLK	469	Low Reference (MAP)
37	BLK	2752	Low Reference (TPS)
38	-	-	Not Used
39	BRN	2129	Low Reference (EST Bank 1)
40	-	-	Not Used
41	YEL/BLK	1868	Low Reference
42	BRN/WHT	2130	Low Reference (EST Bank 2)
43	LT BLU	2123	IC 3 Control
44-45	-	-	Not Used
46	YEL	2868	Low Reference (Crank Return)
47	TAN/BLK	231	Oil Pressure Switch Signal
48	-	-	Not Used
49	RED	631	12-Volt Reference
50	LT GRN	1867	12-Volt Reference
51	LT GRN	2867	12-Volt Reference
52	-	-	Not Used
53	LT BLU/BLK	1748	IAC Coil A Low Control
54	BLK/WHT	3113	HO2S Heater Low Control (Bank 1 Sensor 1]
55	BLK/WHT	845	Fuel Injector 5 Control
56	BRN	3122	HO2S Heater Low Control (Bank 1 Sensor 2)
57	DK BLU/WHT	878	Fuel Injector 8 Control
58	LT GRN/BLK	444	IAC Coil B Low Control
59	LT BLU/BLK	844	Fuel Injector 4 Control
60	YEL/BLK	846	Fuel Injector 6 Control
61	LT BLU/WHT	1747	IAC Coil A High Control
62	DK GRN/WHT	2124	IC 4 Control
63	PPL/WHT	2128	IC 8 Control
64	DK GRN	2125	IC 5 Control
65	RED/WHT	2122	IC 2 Control
66	PNK/BLK	1746	Fuel Injector 3 Control
67	LT GRN	432	MAP Sensor Signal
68	-	-	Not Used
69	RED/BLK	877	Fuel Injector 7 Control
70	DK GRN/WHT	428	EVAP Canister Purge Solenoid Control
71	BLK	1744	Fuel Injector 1 Control
72	LT GRN	1745	Fuel Injector 2 Control
73	BLK/WHT	451	Ground