Engine Control Module (ECM) X2 (except HP2)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) X2 (except HP2) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire Color	Circuit	Function
1	-	-	Not Used
2	0.35 PU/WH	6270	5-Volt Reference
3	0.35 GY	2701	5-Volt Reference
4	-	-	Not Used
5	0.5 BN	582	TAC Motor Control - 2
6	0.5 YE	581	TAC Motor Control - 1
7	-	-	Not Used
8	0.5 D-GN/WH	428	EVAP Canister Purge Solenoid Control
9	0.35 GY	5493	Cylinder Shutoff Solenoid Control (3) (LY5, LMG, L76 or LC9)
10	0.35 D-BU	5491	Cylinder Shutoff Solenoid Control (1) (LY5, LMG, L76 or LC9)
11	0.35 OG	5494	Cylinder Shutoff Solenoid Control (4) (LY5, LMG, L76 or LC9)
12	0.5 GY/WH	3113	HO2S Heater Low Control - Bank 1 Sensor 1
13	0.5 L-GN	3212	HO2S Heater Low Control - Bank 2 Sensor 1
14	0.5 L-GN/BK	5492	Cylinder Shutoff Solenoid Control (2) (LY5, LMG, L76 or LC9)
15	-	-	Not Used
16	0.35 PU	5284	Camshaft Actuator Solenoid Control (L76, L92 or LY6)
17	0.5 D-BU/WH	878	Fuel Injector 8 Control
18	0.5 TN/WH	845	Fuel Injector 5 Control
19	0.5 YE/BK	846	Fuel Injector 6 Control
20	0.5 TN	1744	Fuel Injector 1 Control
21	0.5 YE	410	Engine Coolant Temperature (ECT) Sensor Signal
22	0.5 TN	2761	Low Reference
23-25	-	-	Not Used
26	0.8 D-BU	496	Knock Sensor 1 Signal
27	0.8 GY	1716	Low Reference
28	-	-	Not Used
29	0.8 L-BU	1876	Knock Sensor 2 Signal
30	0.8 GY	2303	Low Reference
31	-	-	Not Used
32	0.5 GY	23	Generator Field Duty Cycle Signal
33	-	-	Not Used
34	0.35 BK	2755	Low Reference
35	0.35 TN	2752	Low Reference
36	-	-	Not Used
37	0.5 L-GN/BK	1745	Fuel Injector 2 Control
38	0.5 PK/BK	1746	Fuel Injector 3 Control
39	0.5 L-BU/BK	844	Fuel Injector 4 Control
40	0.5 OG/BK	877	Fuel Injector 7 Control
41	0.35 GY	2705	5-Volt Reference
42	-	-	Not Used
43	0.35 GY	2704	5-Volt Reference
44	0.35 D-BU	6259	5-Volt Reference
45-49	-	-	Not Used
50	0.35 TN/WH	331	Oil Pressure Sensor Signal
51	-	-	Not Used
52	0.35 TN	2199	Low Reference (6.0L)
53	0.35 OG/BK	469	Low Reference
54-55	-	-	Not Used
56	0.5 TN	1664	HO2S Low Signal - Bank 1 Sensor 1
57	0.5 PU/WH	1665	HO2S High Signal - Bank 1 Sensor 1
58	0.35 L-GN	432	Manifold Absolute Pressure (MAP) Sensor Signal
59	0.5 PU	1666	HO2S High Signal - Bank 2 Sensor 1
60	0.5 TN	1667	HO2S Low Signal - Bank 2 Sensor 1
61	0.5 BN	25	Charge Indicator Control/Charge Indicator Signal
62	-	-	Not Used
63	0.35 PU	486	Throttle Position Sensor 2 Signal
64	0.35 D-BU/WH	6265	CMP Sensor Signal
65	0.35 D-GN	485	Throttle Position Sensor 1 Signal
66	0.35 BN	6266	Low Reference
67	-	-	Not Used
68	0.35 WH/BK	6271	Crankshaft Position (CKP) Sensor Signal
69	0.35 GY/BK	6272	Low Reference
70	0.5 PU	2121	Ignition Coli 1 Control
71	0.5 PU/WH	2128	Ignition Coli 8 Control
72	0.5 OG	2127	Ignition Coli 7 Control
73	0.5 OG/WH	2122	Ignition Coli 2 Control
74	0.5 L-BU/WH	2126	Ignition Coli 6 Control
75	0.5 D-GN	2125	Ignition Coli 5 Control
76	0.5 D-GN/WH	2124	Ignition Coli 4 Control
77	0.5 L-BU	2123	Ignition Coli 3 Control
78	0.5 BN	2129	Low Reference
79	0.5 BN/WH	2130	Low Reference
80	-	-	Not Used

Connector Part Information

OEM: 13511426
Service: 19115670
Description: 80-Way F Receptacle 0.64 2.8 Sealed (GY)

Terminal Part Information

Pins: 2-3, 16, 34-35, 41-53, 58, 63-69
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 5-14, 17-33, 37-40, 56-57, 59-61, 70-79
Terminal/Tray: 33467-0005/23
Core/Insulation Crimp: Pins 5-14, 17-22, 29-33, 37-40, 56-57, 59-61, 70-79: J/J
Core/Insulation Crimp: Pins 26-27: K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)