Engine Control Module (ECM) Connector End View - C3 (6.0L)

Engine Control Module (ECM) Connector End View - C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12582678 73-Way F Micro-Pack 64 Sealed (D-GY)
Pin	Wire Color	Circuit No.	Function
1-2	-	-	Not Used
3	TN	1667	HO2S Low Signal - Bank 2 Sensor 1
4	PU	1666	HO2S High Signal - Bank 2 Sensor 1
5	PU	1670	HO2S High Signal - Bank 2 Sensor 2
6	TN	1671	HO2S Low Signal - Bank 2 Sensor 2
7	OG	225	Generator Turn On Signal
8	L-GN	1652	Reverse Lockout Solenoid Control
9-11	-	-	Not Used
12	TN/BK	464	Delivered Torque Signal
13	GY	587	Skip/Shift Solenoid Control
14	-	-	Not Used
15	L-GN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
16	-	-	Not Used
17	OG/BK	463	Requested Torque Signal
18	BN	1174	Oil Level Switch Signal
19-20	-	-	Not Used
21	TN	5514	Low Reference
22	-	-	Not Used
23	OG/BK	469	Low Reference
24-28	-	-	Not Used
29	GY	23	Generator Field Duty Cycle Signal
30-32	-	-	Not Used
33	TN	2501	High Speed GMLAN Serial Data Bus -
34	-	-	Not Used
35	TN	2761	Low Reference
36	OG/BK	1057	Low Reference
37	GY	2700	5-Volt Reference
38	-	-	Not Used
39	GY	2704	5-Volt Reference
40-46	-	-	Not Used
47	PU/WH	1035	Starter Relay Coil Supply Voltage
48	D-GN/WH	428	EVAP Canister Purge Solenoid Control
49	D-GN	335	Low Speed Cooling Fan Relay Control
50	OG/WH	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
51-52	-	-	Not Used
53	TN/BK	2500	High Speed GMLAN Serial Data Bus +
54	-	-	Not Used
55	YE	410	ECT Sensor Signal
56	YE/BK	1227	TFT Sensor Signal
57	OG/BK	380	A/C Refrigerant Pressure Sensor Signal
58	-	-	Not Used
59	L-GN	432	MAP Sensor Signal
60-65	-	-	Not Used
66	PU/WH	821	VSS High Signal
67	L-GN/BK	822	VSS Low Signal
68-72	-	-	Not Used
73	BK	750	Ground