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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) X1 (LU3)
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWD

Engine Control Module (ECM) X1 (LU3)

2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWDSECTION Engine Control Module (ECM) X1 (LU3)
GM1590596Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness: Engine
  • OEM: 15499466
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 2.8 Series Sealed (BK)

Terminal Part Information
  • Pins: 1, 3, 5, 6, 8, 13, 18, 21, 24, 25, 27, 30, 32, 36, 39, 41, 42, 47, 49, 54, 57, 65-67
  • 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
  • Pins: 2, 9, 10, 15-17, 19, 20, 34, 35, 37, 43, 44, 55, 58, 70-72
  • 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
  • Pin: 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-12A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 1326030-8/17
  • Core/Insulation Crimp: A/4
Engine Control Module (ECM) X1 (LU3)

Pin Wire Circuit Function
1 0.35 D-BU 1161 APP Sensor 1 Signal
2 0.5 PU 1670 HO2S High Signal Bank 2 Sensor 2
3 0.5 D-BU 5985 Accessory Wakeup Serial Data
4 - - Not Used
5 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
6 0.35 D-GN/WH 465 Fuel Pump Relay Control - Primary
7 - - Not Used
8 0.35 TN 514 Low Reference (CJ2 or C67)
9 0.5 TN/WH 1669 HO2S Low Signal Bank 1 Sensor 2
10 0.5 TN 1671 H02S Low Signal Bank 2 Sensor 2
11 0.5 BN 5360 Brake Apply Sensor Low Reference
12 - - Not Used
13 0.35 YE 5991 Powertrain Relay Coil Control
14 - - Not Used
15 0.5 GY/WH 3122 HO2S Heater Low Control Bank 1 Sensor 2
16 0.5 OG/WH 3223 HO2S Heater Low Control bank 1 Sensor 2
17 0.5 PU/WH 1668 HO2S High Signal Bank 1 Sensor 2
18 0.35 L-BU 1162 APP Sensor 2 Signal
19 0.5 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 440 Battery Positive Voltage
21 0.35 PU 1272 Low Reference
22-23 - - Not Used
24 0.35 TN/BK 6049 Low Reference
25 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal (CJ2 or C67)
26 0.5 GY/BK 1694 4WD Low Signal (NQG)
27 0.35 BN/WH 419 MIL Control
28-29 - - Not Used
30 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control (CJ2 or C67)
31 - - Not Used
32 0.35 YE/BK 625 Starter Relay Coil Control
33 - - Not Used
34 0.5 L-GN/BK 822 Vehicle Speed Sensor (VSS) Low Signal (TZ0)
35 - - Not Used
36 0.35 YE 43 Ignition Voltage
37 0.5 YE 492 MAF Sensor Signal
38 - - Not Used
39 0.35 PU 1589 Fuel Level Sensor Signal - Primary
40 - - Not Used
41 0.35 BN 1271 Low Reference
42 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
43 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
44 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
45 0.5 WH 5359 Brake Apply Sensor Supply Voltage
46 - - Not Used
47 0.35 WH/BK 1164 5-Volt Reference 2
48 - - Not Used
49 0.35 D-BU 473 High Speed Cooling Fan Relay Control
50 0.35 YE/BK 1827 Vehicle Speed Signal (except MEX)
51-53 - - Not Used
54 0.35 OG/BK 6399 Replicated TOS Signal (except TZ0)
0.5 PU/WH 821 Vehicle Speed Sensor (VSS) High Signal (TZ0)
55 0.5 L-BU/WH 6311 TCC Brake Signal
56 0.35 WH/BK 1164 5-Volt Reference 2
57 0.35 OG/BK 1786 Park/Neutral Signal (except TZ0)
0.35 D-GN 1433 Clutch Start Switch Signal (TZ0)
58 0.5 TN 472 IAT Sensor Signal (except MEX)
0.5 TN/BK 472 IAT Sensor Signal (MEX)
59-60 - - Not Used
61 0.5 YE 5361 Brake Apply Sensor Signal
62-64 - - Not Used
65 0.35 GY 2700 5-Volt Reference 1
66 0.35 GY 2709 5-Volt Reference 1
67 0.35 TN 1274 5-Volt Reference 1
68-69 - - Not Used
70 0.5 WH 1310 EVAP Canister Vent Solenoid Control
71 0.5 L-BU 2182 Reverse Lamp Relay Control (TZ0)
72 0.5 TN/WH 1695 Axle Switch Signal (NQG)
73 0.5 PK 1339 Ignition 1 Voltage
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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.