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Home >> Chevrolet >> 2021 >> Express 2500 Base, Van Cargo Extended, 2.8L Eng VIN 1 >> Repair and Diagnosis >> Electrical >> Wiring Diagrams >> Component Connector End Views (K18-K64) >> Component Connector End Views >> K20 Engine Control Module X3 (LWN)

K20 Engine Control Module X3 (LWN)

GM784851Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34576-0703
  • Service Connector: 88988373
  • Description: 56 - Way F 0.64 Series, Sealed (BU with BU Terminal Position Assurance)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool
I 19351723 J-35616-64B (LT BU) J-38125-213
Pin Size Color Circuit Function Terminal Type ID Option
1 0.5 BN/WH 3100 Diesel Exhaust Fluid Dosing Valve Low Control I -
2 - - - Not Occupied - -
3 0.5 BK/GN 6281 Fuel Level Sensor Low Reference I -
4 - 5 - - - Not Occupied - -
6 0.5 YE/WH 3200 Throttle Inlet Absolute Pressure Sensor Signal I -
7 0.5 WH/RD 3201 Throttle Inlet Absolute Pressure Sensor 5V Reference I -
8 0.5 BK/YE 407 Sensor Low Reference I -
9 0.5 BK/VT 3661 Exhaust Gas Temperature Sensor 5 Low Reference I -
10 0.5 BK/BU 6274 Exhaust Gas Recirculation Temperature Sensor Low Reference I -
11 0.5 BK/GY 3659 Exhaust Gas Temperature Sensor 4 Low Reference I -
12 0.5 BK/GN 3657 Exhaust Gas Temperature Sensor 3 Low Reference I -
13 0.5 BK/BU 6783 Exhaust Gas Temperature Sensor 2 Low Reference I -
14 0.5 BU/WH 5277 Exhaust Gas Temperature Sensor 1 Signal I -
15 0.5 BN 3099 Diesel Exhaust Fluid Dosing Valve High Control I -
16 - 17 - - - Not Occupied - -
18 0.5 BU/VT 1589 Primary Fuel Level Sensor Signal I -
19 0.5 BK/YE 6275 Exhaust Gas Recirculation Temperature Sensor 2 Low Reference I -
20 0.5 YE/GN 3236 Exhaust Gas Recirculation Temperature Sensor 2 Signal I -
21 0.5 GY/RD 5928 Turbocharger Vane Position Sensor Voltage Reference I -
22 0.5 GN/BK 735 Ambient Air Temperature Sensor Signal 2 I -
23 0.5 BU/GY 3660 Exhaust Gas Temperature Sensor 5 Signal I -
24 0.5 WH/BN 3237 Exhaust Gas Recirculation Temperature Sensor Signal I -
25 0.5 VT/BN 3658 Exhaust Gas Temperature Sensor 4 Signal I -
26 0.5 GY/GN 5378 Exhaust Gas Temperature Sensor 3 Signal I -
27 0.5 BK/BN 6782 Exhaust Gas Temperature Sensor 1 Low Reference I -
28 0.5 BU/GN 5377 Exhaust Gas Temperature Sensor 2 Signal I -
29 - - - Not Occupied - -
30 0.5 YE/BU 1497 Positive Crankcase Ventilation Heater Control I -
31 - - - Not Occupied - -
32 0.5 BN/GY 4008 Humidity Sensor Signal I -
33 0.5 BK/BN 5929 Turbocharger Vane Position Sensor Low Reference I -
34 - 42 - - - Not Occupied - -
43 0.5 GN/BU 3889 Powertrain Sensor Bus Relay Control I -
44 - - - Not Occupied - -
45 0.5 BU 3017 Fuel Heater Relay 1 Control I -
46 0.5 VT/YE 5947 Turbocharger Vane Position Sensor Signal I -
47 - 49 - - - Not Occupied - -
50 0.5 WH/RD 6054 Exhaust Pressure Sensor 1 5V Reference I -
51 0.5 BU 6053 Exhaust Pressure Sensor 1 Signal I -
52 0.5 BK/YE 6055 Exhaust Pressure Sensor 1 Low Reference I -
53 - 56 - - - Not Occupied - -
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