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HOMESERVICE MANUALSGMC2020ACADIA SLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 438 (COMPONENT CONNECTOR END VIEWS (K20-K40))COMPONENT CONNECTOR END VIEWSK20 ENGINE CONTROL MODULE X2 (LSY)
2020 GMC Acadia SL

K20 Engine Control Module X2 (LSY)

2020 GMC Acadia SLSECTION K20 Engine Control Module X2 (LSY)
WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
GM4596458Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine Wiring Harness
  • OEM Connector: 12672838
  • Service Connector: 19355678
  • Description: 49-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 13587518 J-35616-35 (VT) J-38125-11A
II 19351723 J-35616-64B (L-BU) J-38125-213
Pin Size Color Circuit Function Terminal Type ID Option
1 0.5 VT/GN 4320 Powertrain Sensor Bus Enable II LSY
2 0.75 BU/RD 460 Engine Control Sensors 5 Volt Reference 1 II LSY
3 - 4 - - - Not Occupied - -
5 0.5 BN/BU 2447 Evaporative Purge Pump Pressure Signal II LSY
6 - 8 - - - Not Occupied - -
9 0.75 VT/BU 5294 Powertrain Main Relay Fused Supply Voltage 5 II LSY
10 0.5 BU/GY 2978 Coolant Diverter Valve Position Signal II LSY
11 - - - Not Occupied - -
12 0.5 BK/GN 580 Engine Control Sensors Low Reference 2 II LSY
13 - 15 - - - Not Occupied - -
16 0.5 YE/BN 331 Oil Pressure Sensor Signal II LSY
17 0.5 WH/VT 4108 Driver Mode Switch Signal II LSY
18 - - - Not Occupied - -
19 0.75 BU/WH 2918 Fuel Rail Pressure Sensor Signal II LSY
20 0.5 WH 2590 Turbocharger Wastegate Motor Feedback Signal II LSY
21 - - - Not Occupied - -
22 0.5 BK/GY 626 Engine Control Vehicle Sensors Low Reference 1 II LSY
23 0.5 VT 7485 Engine Oil Temperature Sensor 2 Signal II LSY
24 0.5 BN/BU 357 Oil Temperature Sensor Signal II LSY
25 0.5 YE 3054 Turbocharger Intake Pressure Sensor Signal Bank 1 II LSY
26 - 28 - - - Not Occupied - -
29 0.5 BK/GY 936 Crankcase Pressure Sensor Signal II LSY
30 - - - Not Occupied - -
31 0.5 YE/GY 6936 HO2S Signal II LSY
32 0.5 BN 6934 HO2S Ground II LSY
33 - - - Not Occupied - -
34 0.75 GY/WH 3113 HO2S Heater Low Control Bank 1 Sensor 1 II LSY
35 - - - Not Occupied - -
36 0.5 WH/RD 480 Engine Control Vehicle Sensors 5 Volt Reference 1 II LSY
37 0.5 YE/BK 3000 Coolant Temperature Sensor 2 Signal II LSY
38 0.5 BN/GY 4644 Heater Core Inlet Temperature Signal II LSY
39 - - - Not Occupied - -
40 0.5 GY/VT 2404 Engine Block Coolant Temperature Signal II LSY
41 - 44 - - - Not Occupied - -
45 0.5 GN 6935 HO2S Pump Current Trim Signal II LSY
46 0.5 BN/WH 6933 HO2S Pump Current Signal II LSY
47 0.5 GN/VT 4621 Engine Control Module LIN Bus 1 II LSY
48 0.75 GN/WH 4622 Engine Control Module LIN Bus 2 II LSY
49 2 BK/WH 451 Signal Ground I LSY
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.