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