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HOMESERVICE MANUALSCHEVROLET2025TAHOE PPV, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K20-K43)COMPONENT CONNECTOR END VIEWSK20 ENGINE CONTROL MODULE X1 (L84 / L87)
2025 Chevrolet Tahoe PPV, RWD

K20 Engine Control Module X1 (L84 / L87)

2025 Chevrolet Tahoe PPV, RWDSECTION K20 Engine Control Module X1 (L84 / L87)
GM5663663Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine Wiring Harness
  • OEM Connector: 216744-0003
  • Service Connector: 85669159
  • Description: 49-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
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 GN / WH 492 Mass Air Flow Sensor Signal II -
2 - - - Not Occupied - -
3 0.5 BU / GY 4054 Private Serial Data Powertrain CAN Bus [-] Serial Data II -
4 - - - Not Occupied - -
5 0.5 WH 4976 AUTOSAR CAN Bus [-] 3 Serial Data II -
6 - - - Not Occupied - -
7 0.5 WH 4978 AUTOSAR CAN Bus [-] 2 Serial Data II -
8 - - - Not Occupied - -
9 0.5 YE 5991 Powertrain Relay Coil Control II -
10 - - - Not Occupied - -
11 0.5 YE 4063 Hood Status A Signal II -
12 0.5 BU / GY 636 Ambient Air Temperature Sensor Signal II -
13 0.5 WH 4055 Private Serial Data Powertrain CAN Bus [+] Serial Data II -
14 0.5 WH / GN 5380 Brake Position Sensor Signal II -
15 0.5 BU / BK 4977 AUTOSAR CAN Bus [+] 3 Serial Data II -
16 - - - Not Occupied - -
17 0.5 BU / YE 4979 AUTOSAR CAN Bus [+] 2 Serial Data II -
18 0.5 WH / GY 459 Air Conditioning Compressor Clutch Relay Control II -
19 - 20 - - - Not Occupied - -
21 0.75 GN / BU 428 EVAP Canister Purge Solenoid Control II -
22 - - - Not Occupied - -
23 0.5 BK / GN 580 Engine Control Sensors Low Reference 2 II -
24 0.5 BK / BU 1271 Accelerator Pedal Position Low Reference 1 II -
25 - 27 - - - Not Occupied - -
28 0.5 BN / GN 1174 Oil Level Switch Signal II -
29 - - - Not Occupied - -
30 0.5 BK / VT 1272 Accelerator Pedal Position Low Reference 2 II -
31 - - - Not Occupied - -
32 0.75 VT / BU 5291 Powertrain Main Relay Fused Supply Voltage 2 II -
33 - - - Not Occupied - -
34 0.5 RD / BN 440 Battery Positive Voltage II -
35 - - - Not Occupied - -
36 0.5 YE / BK 625 Starter Enable Relay Control II -
37 0.5 GN / GY 465 Fuel Pump Primary Relay Control II -
38 0.5 WH / RD 1164 Accelerator Pedal Position 5V Reference 1 II -
39 0.5 YE / WH 1161 Accelerator Pedal Position Signal 1 II -
40 0.5 YE / BN 331 Oil Pressure Sensor Signal II -
41 0.5 GN 380 Air Conditioning Refrigerant Pressure Sensor Signal II -
42 - 43 - - - Not Occupied - -
44 0.5 GN / WH 1162 Accelerator Pedal Position Signal 2 II -
45 0.5 BN / RD 1274 Accelerator Pedal Position 5V Reference 2 II -
46 - - - Not Occupied - -
47 0.75 VT / GN 439 Run/Crank Ignition 1 Voltage II -
48 0.75 VT / BU 5290 Powertrain Main Relay Fused Supply Voltage 1 II -
49 2 VT 5290 Powertrain Main Relay Fused Supply Voltage 1 I -
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.