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HOMESERVICE MANUALSBUICK2018REGAL BASEREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (F101-K20)COMPONENT CONNECTOR END VIEWSK20 ENGINE CONTROL MODULE X1 (LGX)
2018 Buick Regal Base

K20 Engine Control Module X1 (LGX)

2018 Buick Regal BaseSECTION K20 Engine Control Module X1 (LGX)
GM2889071
Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 19167545
  • Service Connector: 19167545
  • Description: 73-Way F 0.64, 2.8 Series, Sealed (BK with BU Terminal Position Assurance)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool Service Terminal Tray Name Core Crimp Insulation Crimp
I 19355728 J-35616-35 (VT) J-38125-215A Not Available Not Available Not Available Not Available
II 19355736 J-35616-64B (LT BU) J-38125-215A Not Available Not Available Not Available Not Available
III 19355737 J-35616-64B (LT BU) J-38125-215A Not Available Not Available Not Available Not Available
Pin Size Color Circuit Function Terminal Type ID Option
1 - 3 - - - Not Occupied - -
4 0.5 WH 4499 High Speed GMLAN Serial Data (-) 7 II LGX
5 0.35 BK/VT 1272 Accelerator Pedal Position Low Reference 2 III LGX
6 0.35 YE/WH 1161 Accelerator Pedal Position Signal 1 III LGX
7 0.35 BK/BU 1271 Accelerator Pedal Position Low Reference 1 III LGX
8 0.5 WH 7494 High Speed GMLAN Serial Data (-)3 II -
9 0.35 BK/YE 5382 Brake Position Sensor Low Reference III LGX
10 - 11 - - - Not Occupied - -
12 0.5 WH 2501 High Speed GMLAN Serial Data (-) 1 II LGX
13 0.35 WH/BU 6311 Cruise/ETC/TCC Brake Signal III LGX
14 0.35 WH/GY 459 A/C Compressor Clutch Relay Control III LGX
15 0.5 YE 5991 Powertrain Relay Coil Control II LGX
16 0.35 BN/WH 419 Check Engine Indicator Control III LGX
17 0.35 WH 2368 Cooling Fan Control Signal III LGX
18 - 19 - - - Not Occupied - -
20 0.5 BU/BN 4498 High Speed GMLAN Serial Data (+) 7 II LGX
21 0.35 BN/RD 1274 Accelerator Pedal Position 5V Reference 2 III LGX
22 0.35 GN/WH 1162 Accelerator Pedal Position Signal 2 III LGX
23 0.35 WH/RD 1164 Accelerator Pedal Position 5V Reference 1 III LGX
24 0.5 BU/BK 7493 High Speed GMLAN Serial Data (+)3 II -
25 0.35 WH/RD 5381 Brake Position Sensor 5V Reference III LGX
26 0.35 WH/GN 5380 Brake Position Sensor Signal III LGX
27 - - - Not Occupied - -
28 0.5 BU 2500 High Speed GMLAN Serial Data (+) 1 II LGX
29 - - - Not Occupied - -
30 0.5 GN/WH 492 Mass Air Flow Sensor Signal II LGX
31 0.35 YE/BK 625 Starter Enable Relay Control III LGX
32 - 33 - - - Not Occupied - -
34 0.35 GY 5127 After Boil Heater Relay Control III LGX
35 - 38 - - - Not Occupied - -
39 0.5 BN/GY 4008 Humidity Sensor Signal II LGX
40 0.5 YE/BU 4171 Transmission Position Sensor A 9V Reference II LGX
41 - 43 - - - Not Occupied - -
44 0.5 BK/GN 580 Engine Control Sensors Low Reference (2) II LGX
45 0.35 YE/RD 6031 Brake Vacuum Sensor 5V Reference III LGX
46 - - - Not Occupied - -
47 0.35 BN/RD 2700 A/C Pressure Sensor 5V Reference III LGX
48 - - - Not Occupied - -
49 0.5 VT/BU 5292 Powertrain Main Relay Fused Supply 3 II LGX
50 0.5 VT/BU 5291 Powertrain Main Relay Fused Supply 2 II LGX
51 0.5 VT/YE 5985 Accessory Wakeup Serial Data II LGX
52 0.5 RD/WH 140 Battery Positive Voltage II LGX
53 - 55 - - - Not Occupied - -
56 0.35 YE 5530 Hood Open Switch Signal III LGX
57 - 59 - - - Not Occupied - -
60 0.5 WH/BU 5726 Ignition Mode Switch Mode Control Backup II LGX
61 - 63 - - - Not Occupied - -
64 0.35 BU/GY 636 Outside Ambient Air Temperature Sensor Signal III LGX
65 0.35 YE/VT 6030 Brake Vacuum Sensor Signal III LGX
66 - - - Not Occupied - -
67 0.35 GN 380 A/C Refrigerant Pressure Sensor Signal III LGX
68 - - - Not Occupied - -
69 0.35 GN/GY 465 Fuel Pump Primary Relay Control III LGX
70 0.35 YE/VT 4325 Starter Pinion Solenoid Relay Control III LGX
71 0.5 VT/GN 439 Run/Crank Ignition 1 Voltage II LGX
72 0.75 VT/BU 5292 Powertrain Main Relay Fused Supply 3 II LGX
73 2.5 VT/BU 5290 Powertrain Main Relay Fused Supply 1 I LGX
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.