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HOMESERVICE MANUALSCHEVROLET2013SILVERADO 2500 HD LT, 2D CAB CHASSIS, 6.6L ENG VIN 8, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - DRIVE MOTOR GENERATOR BATTERY CONTROL MODULE TO FUEL PUMP DISABLE MODULECOMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X2 (LU3)
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWD

Engine Control Module (ECM) X2 (LU3)

2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWDSECTION Engine Control Module (ECM) X2 (LU3)
GM1590596Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness: Engine
  • OEM: 15497996
  • Service: 88988372
  • Description: 73-Way F 0.64 2.8 Series Sealed (GY)
Terminal Part Information
  • Pins: 4, 6-13, 16, 22-24, 30-32, 35-39, 41, 43, 48-51, 58, 65-66, 68, 70-71
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Pins: 5, 20, 33, 44-46, 53-54, 57, 59
  • Terminated Lead: 13575811
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pin: 73
  • Terminated Lead: 13579751
  • Release Tool: J-38125-12A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 1326030-8/17
  • Core/Insulation Crimp: 4/D
Engine Control Module (ECM) X2 (LU3)

Pin Wire Circuit Function
1-3 - - Not Used
4 0.5 TN 2761 Low Reference
5 0.35 GY/BK 6272 Low Reference
6 0.5 TN 1744 Fuel Injector 1 Control
7 0.5 YE/BK 846 Fuel Injector 6 Control
8 0.5 TN/WH 845 Fuel Injector 5 Control
9 0.5 BN 2129 Low Reference
10 0.5 L-BU/BK 844 Fuel Injector 4 Control
11 0.5 PK/BK 1746 Fuel Injector 3 Control
12 0.5 L-GN/BK 1745 Fuel Injector 2 Control
13 0.5 GY 2704 5-Volt Reference 1
14-15 - - Not Used
16 0.5 YE 581 TAC Motor Control - 1
17-19 - - Not Used
20 0.35 BN 6266 Low Reference
21 - - Not Used
22 0.5 PU 2121 IC 1 Control
23 0.5 L-BU 2123 IC 3 Control
24 0.5 OG/WH 2122 IC 2 Control
25-29 - - Not Used
30 0.5 D-GN/WH 428 EVAP Canister Purge Solenoid Control
31 0.5 BN 25 Charge Indicator Signal
32 0.5 BN 582 TAC Motor Control - 2
33 0.35 D-BU 6259 5-Volt Reference 1
34 - - Not Used
35 0.5 GY 2705 5-Volt Reference 1
36 0.5 TN/WH 331 Oil Pressure Sensor Signal
37 0.5 PU/WH 1665 HO2S High Signal Bank 1 Sensor 1
38 0.5 PU 1666 HO2S High Signal Bank 2 Sensor 1
39 0.5 L-GN 432 MAP Sensor Signal
40 0.35 TN 2752 Low Reference
41 0.5 BK 2755 Low Reference
42 - - Not Used
43 0.5 GY 23 Generator Field Duty Cycle Signal
44 - - Not Used
45 0.35 WH/BK 6271 CKP Sensor Signal
46 0.35 D-BU/WH 6265 CMP Sensor Signal
47 - - Not Used
48 0.5 TN 1664 HO2S Low Signal Bank 1 Sensor 1
49 0.5 OG/BK 469 Low Reference
50 0.5 GY 1716 KS 1 Signal
51 0.5 D-BU 496 KS 1 Signal
52 - - Not Used
53 0.35 GY 2701 5-Volt Reference 2
54 0.35 PU/WH 6270 5-Volt Reference 2
55-56 - - Not Used
57 0.35 D-GN 485 TP Sensor 1 Signal
58 0.5 YE 410 ECT Sensor Signal
59 0.35 PU 486 TP Sensor 2 Signal
60-64 - - Not Used
65 0.5 GY/WH 3113 HO2S Heater Low Control Bank 1 Sensor 1
66 0.5 L-GN 3212 HO2S Heater Low Control Bank 2 Sensor 1
67 - - Not Used
68 0.5 TN 1667 HO2S Low Signal Bank 2 Sensor 1
69 - - Not Used
70 0.5 GY 2303 KS 2 Signal
71 0.5 L-BU 1876 KS 2 Signal
72 - - Not Used
73 3 BK/WH 451 Ground
RENDER: 1.0x

NO RELATED

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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.