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HOMESERVICE MANUALSCHEVROLET2011TAHOE BASE, 5.3 0, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1903 (WIRING SYSTEMS AND POWER MANAGEMENT - CONNECTOR END VIEWS - 2 OF 4)ENGINE CONTROL MODULE (ECM) X1 (DIESEL)
2011 Chevrolet Tahoe Base, 5.3 0, 4WD

Engine Control Module (ECM) X1 (Diesel)

2011 Chevrolet Tahoe Base, 5.3 0, 4WDSECTION 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
GM1544242Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (Diesel)

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)
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.