Powertrain Control Module (PCM) Connector End Views

Powertrain Control Module (PCM), C1 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357150 56-Way F Micro-Pack 64 Series (BLU)
Pin	Wire Color	Circuit No.	Function
1-3	-	-	Not Used
4	PPL	420	TCC Brake Switch/Cruise Control Release Signal
5-6	-	-	Not Used
7	BLK	2760	Low Reference
8-10	-	-	Not Used
11	BLK	2759	Low Reference
12-14	-	-	Not Used
15	PPL	1807	Class 2 Serial Data
16-17	-	-	Not Used
18	PPL	1500	Ignition 0 Voltage
19	PNK	639	Ignition 1 Voltage
20	ORN	480	Battery Positive Voltage
21	TAN	472	IAT Sensor Signal
22	PPL	1589	Fuel Level Sensor Signal
23	GRY	2700	5-Volt Reference
24	-	-	Not Used
25	GRY	2709	5-Volt Reference
26-29	-	-	Not Used
30	DK BLU	473	High Speed Cooling Fan Relay Control
31	-	-	Not Used
32	WHT	121	Cruise Control Inhibit Signal
33	BRN/WHT	419	MIL Control
34	DK GRN/WHT	817	Vehicle Speed Signal
35-36	-	-	Not Used
37	RED/BLK	380	A/C Refrigerant Pressure Sensor Signal
38	-	-	Not Used
39	DK GRN	890	Fuel Tank Pressure Sensor Signal
40-42	-	-	Not Used
43	DK GRN	335	Low Speed Cooling Fan Relay Control
44	-	-	Not Used
45	WHT	1310	EVAP Canister Vent Solenoid Control
46	DK GRN/WHT	465	Fuel Pump Relay Control
47	DK GRN/ WHT	459	A/C Compressor Clutch Relay Control
48	-	-	Not Used
49	DK GRN	83	Cruise Control Inhibit Signal
50	-	-	Not Used
51	BLK	2751	Low Reference
52-56	-	-	Not Used

Powertrain Control Module (PCM), C2 Connector End View

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357133 73-Way F Micro-Pack 64 Series (BLK)
Pin	Wire Color	Circuit No.	Function
1	LT BLU/BLK	1748	IAC Coil A Low Control
2	LT BLU/WHT	1747	IAC Coil A High Control
3-4	-	-	Not Used
5	DK GRN/WHT	428	EVAP Canister Purge Solenoid Control
6	RED/BLK	1228	PC Solenoid Valve High Control (Sol. A)
7	LT BLU/WHT	1229	PC Solenoid Valve Low Control (Sol. A)
8-9	-	-	Not Used
10	LT GRN	1222	1-2 Shift Solenoid Valve Control
11	YEL/BLK	1223	2-3 Shift Solenoid Valve Control
12	BRN	418	TCC PWM Solenoid Valve Control
13	PPL/WHT	1668	HO2S High Signal (Bank 1 Sensor 2)
14	TAN/WHT	1669	HO2S Low Signal (Bank 1 Sensor 2)
15	TAN	1667	HO2S Low Signal (Bank 2 Sensor 1)
16	PPL	1666	HO2S High Signal (Bank 2 Sensor 1)
17	LT GRN/WHT	1749	IAC Coil B High Control
18	LT GRN/BLK	444	IAC Coil B Low Control
19	WHT	423	IC Timing Control
20	ORN	406	IC Timing Control B
21-25	-	-	Not Used
26	BRN/WHT	633	CMP Sensor Signal
27	YEL	573	CKP Sensor 1 Signal
28	PPL	574	Low Reference
29	LT GRN	432	MAP Sensor Signal
30	-	-	Not Used
31	DK BLU	417	TP Sensor Signal
32-33	-	-	Not Used
34	WHT	776	Transmission Range Switch Signal P
35	GRY	773	Transmission Range Switch Signal C
36	YEL	772	Transmission Range Switch Signal B
37	BLK/WHT	771	Transmission Range Switch Signal A
38	-	-	Not Used
39	BLK/WHT	2761	Low Reference
40	WHT/BLK	2762	Low Reference
41	DK BLU/WHT	1231	AT ISS Low Signal
42	PPL	401	Signal Low - Front
43	-	-	Not Used
44	GRY	1716	Low Reference
45	ORN/BLK	469	Low Reference
46	-	-	Not Used
47	BLK	2752	Low Reference
48	-	-	Not Used
49	GRY	23	Generator Field Duty Cycle Signal
50	RED	225	Generator Turn On Signal
51	BLK	1744	Fuel Injector 1 Control
52	LT GRN/BLK	1745	Fuel Injector 2 Control
53	LT BLU/BLK	396	Cruise Control Engaged Signal
54	TAN/BLK	231	Oil Pressure Switch Signal
55	-	-	Not Used
56	DK BLU	1225	Transmission Fluid Pressure Switch Signal B
57	RED	1226	Transmission Fluid Pressure Switch Signal C
58	YEL	657	TCC Release Switch Signal
59	YEL	410	ECT Sensor Signal
60	YEL/BLK	1227	TFT Sensor Signal
61	RED/BLK	1230	AT ISS High Signal
62	YEL	400	Signal - High Front
63	-	-	Not Used
64	DK BLU	496	Knock Sensor Signal
65	BRN	2704	5-Volt Reference
66	-	-	Not Used
67	GRY/BLK	2701	5-Volt Reference
68	-	-	Not Used
69	DK GRN	676	HO2S Heater High Control (Bank 1 Sensor 1)
70	BLK/WHT	1423	HO2S Heater Low Control (Bank 1 Sensor 2)
71	LT BLU/BLK	844	Fuel Injector 4 Control
72	PNK/BLK	1746	Fuel Injector 3 Control
73	BLK/WHT	451	Ground