Engine Control Module (ECM) X1 (Diesel)

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) X1 (Diesel) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	1 OG	5421	Fuel Injector Supply Voltage 1
2	1 D-BU/WH	878	Fuel Injector 8
3	1 OG/BK	877	Fuel Injector 7 Control
4	-	-	Not Used
5	0.5 YE	492	MAF Sensor Signal
6	0.5 OG/BK	469	Low Reference
7-8	-	-	Not Used
9	0.5 BN	1174	Oil Level Switch Signal
10	-	-	Not Used
11	0.5 GY/BK	6272	Low Reference
12	0.5 GY	2704	5-Volt Reference 3
13	0.5 TN	5928	5-Volt Reference 3
14	0.5 GY	6054	5-Volt Reference 2
15	0.5 GY	2705	5-Volt Reference 2
16	-	-	Not Used
17	0.5 GY	2701	5-Volt Reference 1
18	-	-	Not Used
19	0.5 L-GN	432	MAP Sensor Signal
20	0.5 YE	5947	Turbocharger Vane Position Sensor Signal
21	0.5 L-BU	1162	APP Sensor 2 Signal
22	-	-	Not Used
23	0.5 BK	2755	Low Reference
24	0.5 PU/WH	2530	Fuel Pressure Regulator Solenoid Supply Voltage
25	1 PK	5425	Fuel Injector Supply Voltage 4
26	1 YE/BK	846	Fuel Injector 6 Control
27	1 PK/BK	1746	Fuel Injector 3 Control
28-29	-	-	Not Used
30	0.5 OG/BK	2919	Low Reference
31-32	-	-	Not Used
33	0.5 GY/BK	2931	Low Reference
34	-	-	Not Used
35	0.5 YE/BK	6055	Low Reference
36	0.5 TN	2752	Low Reference
37	0.5 GY	2702	5-Volt Reference 3
38	0.5 TN	1274	5-Volt Reference 2
39	0.5 TN	2917	5-Volt Reference 2
40	0.5 PU/WH	6270	5-Volt Reference 1
41	0.5 D-BU	6259	5-Volt Reference 1
42	0.5 TN	472	IAT Sensor Signal
43	0.5 D-BU	6053	DPF Sensor Signal
44	0.5 TN/WH	331	Oil Pressure Sensor Signal
45	0.5 L-GN	2032	ECT Sensor Signal
46	-	-	Not Used
47	0.5 TN	2761	Low Reference
48	0.5 D-BU	5930	Turbocharger Vane Position Control Solenoid Valve Control
49	1 PU	5423	Fuel Injector Supply Voltage 3
50	1 TN/WH	845	Fuel Injector 5 Control
51	1 L-BU/BK	844	Fuel Injector 4 Control
52	-	-	Not Used
53	0.5 YE/BK	6120	Low Reference
54-55	-	-	Not Used
56	0.5 D-BU/WH	6265	CMP Sensor Signal
57	0.5 GY/BK	1694	4WD Low Signal (NQG/NP2)
58-61	-	-	Not Used
62	0.5 TN	2760	Low Reference
63	0.5 OG/BK	5929	Low Reference
64	0.5 L-BU/BK	6813	Low Reference
65	0.5 L-BU	6118	Air Temperature Sensor Signal
66	0.35 PU/WH	7584	Exhaust Gas Recirculation Temperature Sensor 1 Supply Voltage
67	0.5 BN/WH	5763	EGR Valve Sensor Signal
68	0.5 YE	410	ECT Sensor Signal
69	0.5 D-BU	5277	Exhaust Gas Temperature Sensor Signal
70	0.5 BN	6782	Low Reference
71	0.5 YE/BK	625	Starter Enable Relay Control
72	0.5 YE	2834	Fuel Pressure Regulator Solenoid Control
73	1 YE	5422	Fuel Injector Supply Voltage 2
74	1 TN	1744	Fuel Injector 1 Control
75	1 L-GN/BK	1745	Fuel Injector 2 Control
76	0.5 PK	1339	Ignition 1 Voltage
77	0.5 RD/WH	440	Battery Positive Voltage
78	0.5 PU	1272	Low Reference
79	0.5 WH/BK	6271	CKP Sensor Signal
80-81	-	-	Not Used
82	0.5 TN/WH	1695	Axle Switch Signal (NQG/NP2)
83	0.5 L-BU/WH	6311	TCC Brake Signal
84	0.5 D-GN/WH	6142	Power Take Off Engine Shutdown Signal (PTO)
85	0.5 YE/BK	508	Water In Fuel Indicator Control
86	0.5 TN	2753	Low Reference
87	0.5 GY/BK	5765	Fuel Filter Pressure Switch Signal
88	0.5 BN	6266	Low Reference
89	-	-	Not Used
90	0.35 D-BU	7583	Exhaust Gas Recirculation Temperature Sensor 2 Supply Voltage
91	0.5 D-GN	485	TP Sensor Signal
92	0.5 YE	2918	FRP Sensor Signal
93	0.5 L-BU	5377	Exhaust Gas Temperature Sensor Signal
94	0.5 BN/WH	6783	Low Reference
95	0.35 BN	6274	Low Reference
96	0.5 WH	5931	Low Reference

Connector Part Information

OEM: 15438366
Service: 19149311
Description: 96-Way F Sealed (BK)

Terminal Part Information

Pins: 1-3, 25-27, 49-51, 73-75
Terminal/Tray: 1928498135/19
Core/Insulation Crimp: K/K
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Pins: 5-6, 9, 11-15, 17, 19-21, 23-24, 30, 33, 35-45, 47-48, 53, 56, 62-72, 76-79, 82-88, 90-96
Terminal/Tray: 1928498135/19
Core/Insulation Crimp: J/J
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)