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HOMESERVICE MANUALSCHEVROLET2018SILVERADO 2500 HD WT, 2D PICKUP, 6.0L ENG VIN G, RWD, GASREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (E37EL - K20)COMPONENT CONNECTOR END VIEWSK20 ENGINE CONTROL MODULE X3 (L5P)
2018 Chevrolet Silverado 2500 HD WT, 2D Pickup, 6.0L Eng VIN G, RWD, Gas

K20 Engine Control Module X3 (L5P)

2018 Chevrolet Silverado 2500 HD WT, 2D Pickup, 6.0L Eng VIN G, RWD, GasSECTION K20 Engine Control Module X3 (L5P)
GM2474736
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 13782479
  • Service Connector: 13577545
  • Description: 80-Way F MX123 Series, Sealed (BU)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool Service Terminal Tray Name Core Crimp Insulation Crimp
I 13575812 J-35616-64B (LT BU) J-38125-213 Not Available Not Available Not Available Not Available
Pin Size Color Circuit Function Terminal Type ID Option
1 0.75 BN 3099 DEF Dosing Valve High Control I -
2 - - - Not Occupied - -
3 0.5 GN/BU 3889 DEF Power Module Relay Control I -
4 - 11 - - - Not Occupied - -
12 0.5 YE/BK 3682 Charge Air Cooler Inlet Temperature Sensor Low Reference I -
13 0.5 YE/BU 3680 Charge Air Cooler Outlet Temperature Sensor Low Reference I -
14 0.5 BK/YE 6275 Exhaust Gas Recirculation Temperature Sensor 2 Low Reference I -
15 0.5 BK/BU 6274 Exhaust Gas Recirculation Temperature Sensor Low Reference I -
16 0.5 BK/VT 3661 Exhaust Gas Temperature Sensor 5 Low Reference I -
17 0.5 BK/GY 3659 Exhaust Gas Temperature Sensor 4 Low Reference I -
18 0.5 BK/GN 3657 Exhaust Gas Temperature Sensor 3 Low Reference I -
19 0.5 BK/BU 6783 Exhaust Gas Temperature Sensor 2 Low Reference I -
20 0.5 BK/BN 6782 Exhaust Gas Temperature Sensor 1 Low Reference I -
21 0.75 BN/WH 3100 DEF Dosing Valve Low Control I -
22 - 24 - - - Not Occupied - -
25 0.5 WH/GN 6142 Power Take Off Engine Shutdown Signal I -
26 - 27 - - - Not Occupied - -
28 0.5 WH/RD 3201 Throttle Inlet Absolute Pressure Sensor 5V Reference I -
29 0.5 BN/GN 5266 Ambient Air Pressure Sensor Signal I -
30 - 31 - - - Not Occupied - -
32 0.5 GN 3683 Charge Air Cooler Inlet Temperature Sensor Signal I -
33 0.5 BN 3681 Charge Air Cooler Outlet Temperature Sensor Signal I -
34 0.5 YE/GN 3236 Exhaust Gas Recirculation Temperature Sensor 2 Signal I -
35 0.5 WH/BN 3237 Exhaust Gas Recirculation Temperature Sensor Signal I -
36 0.5 BU/GY 3660 Exhaust Gas Temperature Sensor 5 Signal I -
37 0.5 VT/BN 3658 Exhaust Gas Temperature Sensor 4 Signal I -
38 0.5 GY/GN 5378 Exhaust Gas Temperature Sensor 3 I -
39 0.5 BU/GN 5377 Exhaust Gas Temperature Sensor 2 I -
40 0.5 BU/WH 5277 Exhaust Gas Temperature Sensor 1 I -
41 - 64 - - - Not Occupied - -
65 0.5 BK/BN 6141 Cooling Fan Speed Low Reference I -
66 0.5 BU/VT 2364 Cooling Fan Speed Signal I -
67 0.5 GY/RD 2365 Cooling Fan Speed 5V Reference I -
68 - 75 - - - Not Occupied - -
76 0.5 BK/YE 6055 Exhaust Pressure Sensor Low Reference 1 I -
77 0.5 BU 6053 Exhaust Pressure Sensor Signal 1 I -
78 0.5 WH/RD 6054 Exhaust Pressure Sensor 5V Reference 1 I -
79 - 80 - - - Not Occupied - -
RENDER: 1.0x

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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.