Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2014EXPRESS 2500 BASE, VAN CARGO EXTENDED, 6.0L ENG VIN GREPAIR AND DIAGNOSISQUICK LOOKUPSWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - K17 (EXCEPT JL4) TO K9 (X1)COMPONENT CONNECTOR END VIEWSK20 ENGINE CONTROL MODULE (ECM) X1 & X2K20 ENGINE CONTROL MODULE X1 (LC8, LMF, L20 OR L96)
2014 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G
K20 Engine Control Module X1 (LC8, LMF, L20 or L96)
2014 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION K20 Engine Control Module X1 (LC8, LMF, L20 or L96)
Connector Part Information
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Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool | Service Terminal | Tray | Core Crimp | Insulation Crimp |
|---|---|---|---|---|---|---|---|
| I | Pins: 1, 12-13, 23, 29-30, 32, 34, 36, 50, 52, 56-57, 63, 68 - 13575811 | J-35616-64B (L-BU) | J-38125-213 | Pins: 1, 12, 13, 23, 29, 30, 32, 34, 36, 50, 52, 56, 57, 63, 68 - 33467-0003 | 23 | Pins: 9, 16, 18-20, 24, 26-28, 31, 33, 47, 54, 59, 61, 71 - J | J |
| II | Service by Harness - See Part Catalog | J-35616-35 (VT) | J-38125-11A | 7116-4152-02 | 9 | A | 5 |
K20 Engine Control Module X1 (LC8, LMF, L20 or L96)
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 0.5 | OG/BK | 1786 | Park/Neutral Signal | I | - |
| 2-8 | - | - | - | Not Occupied | - | - |
| 9 | 0.5 | L-BU/WH | 6311 | Torque Converter Clutch (TCC) Brake Signal | I | - |
| 10 | 0.8 | PU/WH | 1668 | Heated Oxygen Sensor (HO2S) High Signal - Bank 1 Sensor 2 | I | - |
| 11 | 0.8 | TN/WH | 1669 | Heated Oxygen Sensor (HO2S) Low Signal - Bank 1 Sensor 2 | I | - |
| 12 | 0.35 | OG/BK | 380 | A/C Refrigerant Pressure Sensor Signal | I | C60 |
| 13 | 0.35 | TN | 5514 | Low Reference | I | C60 |
| 14-15 | - | - | - | Not Occupied | - | - |
| 16 | 0.5 | PU | 1589 | Fuel Level Sensor Signal - Primary | I | - |
| 17 | - | - | - | Not Occupied | - | - |
| 18 | 0.5 | D-BU | 5985 | Accessory Wakeup Serial Data | I | - |
| 19 | 0.5 | PK | 439 | Ignition Voltage | I | - |
| 20 | 0.5 | RD/WH | 440 | Battery Positive Voltage | I | - |
| 21 | - | - | - | Not Occupied | - | - |
| 22 | 0.8 | L-BU/BK | 6813 | Low Reference | I | - |
| 23 | 0.35 | PU | 1272 | Low Reference | I | - |
| 24 | 0.5 | D-GN | 890 | Fuel Tank Pressure Sensor Signal | I | - |
| 25 | - | - | - | Not Occupied | - | - |
| 26 | 0.5 | YE | 5361 | Brake Apply Sensor Signal | - | - |
| 27 | 0.5 | TN | 2501 | High Speed GMLAN Serial Data Bus (-) | I | - |
| 28 | 0.5 | TN/BK | 2500 | High Speed GMLAN Serial Data Bus (+) | I | - |
| 29 | 0.35 | D-BU | 1161 | Accelerator Pedal Position (APP) Sensor 1 Signal | I | - |
| 30 | 0.35 | BN | 1271 | Low Reference | I | - |
| 31 | 0.5 0.5 |
TN/BK TN/BK |
2759 6049 |
Low Reference Low Reference |
I | L20 or L96 LMF |
| 32 | 0.35 | L-BU | 1162 | Accelerator Pedal Position (APP) Sensor 2 Signal | I | - |
| 33 | 0.5 | GY | 2709 | 5-Volt Reference 1 | I | - |
| 34 | 0.35 | GY | 2700 | 5-Volt Reference 1 | I | C60 |
| 35 | - | - | - | Not Occupied | - | - |
| 36 | 0.35 | TN | 1274 | 5-Volt Reference 1 | I | - |
| 37 | 0.5 | TN/WH | 472 | Intake Air Temperature (IAT) Sensor Signal | I | - |
| 38 | 0.8 | TN | 2760 | Low Reference | I | - |
| 39 | 0.8 | L-GN | 2032 | Engine Coolant Temperature (ECT) Sensor Signal | I | - |
| 40 | - | - | - | Not Occupied | - | - |
| 41 | 0.8 | YE | 492 | Mass Air Flow (MAF) Sensor Signal | I | - |
| 42 | 0.5 | BN | 5360 | Brake Apply Sensor Low Reference | - | - |
| 43-46 | - | - | - | Not Occupied | - | - |
| 47 | 0.5 | PK | 1339 | Ignition Voltage | I | - |
| 48 | - | - | - | Not Occupied | - | - |
| 49 | 0.8 | TN | 1671 | Heated Oxygen Sensor (HO2S) Low Signal - Bank 2 Sensor 2 | I | - |
| 50 | 0.35 | D-GN/WH | 465 | Fuel Pump Relay Control - Primary | I | - |
| 51 | - | - | - | Not Occupied | - | - |
| 52 | 0.35 | YE/BK | 625 | Starter Enable Relay Control | I | - |
| 53 | - | - | - | Not Occupied | - | - |
| 54 | 0.5 | WH | 5359 | Brake Apply Sensor Supply Voltage | - | - |
| 55 | - | - | - | Not Occupied | - | - |
| 56 | 0.35 | WH/BK | 1164 | 5-Volt Reference 2 | I | - |
| 57 | 0.35 | YE/BK | 1827 | Vehicle Speed Signal | I | - |
| 58 | - | - | - | Not Occupied | - | - |
| 59 | 0.5 | YE | 5991 | Powertrain Relay Control | I | - |
| 60 | - | - | - | Not Occupied | - | - |
| 61 | 0.5 | WH | 1310 | Evaporative Emission (EVAP) Canister Vent Solenoid Control | I | - |
| 62 | - | - | - | Not Occupied | - | - |
| 63 | 0.35 | D-GN/WH | 459 | A/C Compressor Clutch Relay Control | I | C60 |
| 64 | 0.8 | OG/WH | 3223 | Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 2 Sensor 2 | I | - |
| 65 | 0.8 | GY/WH | 3122 | Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 1 Sensor 2 | I | - |
| 66-67 | - | - | - | Not Occupied | - | - |
| 68 | 0.35 | BN/WH | 419 | MIL Control | I | - |
| 69 | 0.8 | PU | 1670 | Heated Oxygen Sensor (HO2S) High Signal - Bank 2 Sensor 2 | I | - |
| 70 | - | - | - | Not Occupied | - | - |
| 71 | 0.5 | OG/BK | 6399 | Replicated TOS Signal | I | - |
| 72 | - | - | - | Not Occupied | - | - |
| 73 | 3 | BK/WH | 1551 | Ground | II | - |
RENDER: 1.0x
NO RELATED
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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.