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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 X2 (L8T)

K20 Engine Control Module X2 (L8T)

GM1673472Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 34566-0103
  • Service Connector: 19333090
  • Description: 73 - Way F 0.64, 2.8 Series, Sealed (BK with BK Terminal Position Assurance)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool
I 19354746 J-35616-64B (LT BU) J-38125-215A
II 19368324 J-35616-35 (VT) J-38125-11A
Pin Size Color Circuit Function Terminal Type ID Option
1 0.5 GN/YE 3212 HO2S Heater Low Control Bank 2 Sensor 1 I -
2 - - - Not Occupied - -
3 0.5 BK/YE 548 Engine Control Sensors Low Reference 1 I -
4 - 6 - - - Not Occupied - -
7 0.5 GN/WH 4622 Engine Control Module LIN Bus 2 I -
8 - 9 - - - Not Occupied - -
10 0.5 VT/GY 3110 HO2S High Signal Bank 1 Sensor 1 I -
11 0.5 WH/BK 3111 HO2S Low Signal Bank 1 Sensor 1 I -
12 0.5 YE/BU 2124 Ignition Control 4 I -
13 0.5 BN/BU 2126 Ignition Control 6 I -
14 - 15 - - - Not Occupied - -
16 0.75 VT/BU 5291 Powertrain Main Relay Fused Supply Voltage 2 I -
17 0.5 GY/WH 3113 HO2S Heater Low Control Bank 1 Sensor 1 I -
18 - 25 - - - Not Occupied - -
26 0.5 VT/WH 3210 HO2S High Signal Bank 2 Sensor 1 I -
27 0.5 YE/WH 3211 HO2S Low Signal Bank 2 Sensor 1 I -
28 0.5 GN/BU 2123 Ignition Control 3 I -
29 0.5 BU/GY 2125 Ignition Control 5 I -
30 0.5 BK/GY 2130 Ignition Control Low Reference Bank 2 I -
31 - 32 - - - Not Occupied - -
33 0.5 WH/BN 3223 HO2S Heater Low Control Bank 2 Sensor 2 I -
34 - - - Not Occupied - -
35 0.5 BU 179 Engine Oil Pump Control I -
36 - - - Not Occupied - -
37 0.5 VT/BU 5293 Powertrain Main Relay Fused Supply Voltage 4 I -
38 - - - Not Occupied - -
39 0.5 WH/RD 480 Engine Control Vehicle Sensors 5 Volt Reference 1 I -
40 - 45 - - - Not Occupied - -
46 0.5 YE/BU 3221 HO2S Low Signal Bank 2 Sensor 2 I -
47 0.5 VT/GN 3220 HO2S High Signal Bank 2 Sensor 2 I -
48 - 49 - - - Not Occupied - -
50 0.75 BK/GY 2303 Knock Sensor Low Reference 2 I -
51 0.75 BK/YE 1716 Knock Sensor Low Reference 1 I -
52 0.5 BN/WH 582 Throttle Actuator Close Control I -
53 0.5 GY/WH 3122 HO2S Heater Low Control Bank 1 Sensor 2 I -
54 - 58 - - - Not Occupied - -
59 0.5 BU/RD 460 Engine Control Sensors 5 Volt Reference 1 I -
60 - 65 - - - Not Occupied - -
66 0.5 WH/YE 3121 HO2S Low Signal Bank 1 Sensor 2 I -
67 0.5 VT/BU 3120 HO2S High Signal Bank 1 Sensor 2 I -
68 - 69 - - - Not Occupied - -
70 0.75 WH/GY 1876 Knock Sensor 2 Signal I -
71 0.75 VT/GY 496 Knock Sensor 1 Signal I -
72 0.5 YE 581 Throttle Actuator Open Control I -
73 3 BK/WH 1551 Signal Ground II -
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