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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1860 (WIRING SYSTEMS AND POWER MANAGEMENT - ELECTRICAL CENTER IDENTIFICATION, COMPONENT CONNECTOR & SPLICE PACK CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X1 (4.3L)
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Engine Control Module (ECM) X1 (4.3L)
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Engine Control Module (ECM) X1 (4.3L)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Engine Control Module (ECM) X1 (4.3L)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | 0.35 D-BU | 1161 | Accelerator Pedal Position (APP) Sensor 1 Signal |
| 2 | 0.8 PU | 1670 | Heated Oxygen Sensor (HO2S) High Signal - Bank 2 Sensor 2 |
| 3 | 0.5 D-BU | 5985 | Accessory Wakeup Serial Data |
| 4-5 | - | - | Not Used |
| 6 | 0.35 D-GN/WH | 465 | Fuel Pump Relay Control - Primary |
| 7 | - | - | Not Used |
| 8 | 0.35 TN | 5514 | Low Reference (C60) |
| 9 | 0.8 TN/WH | 1669 | Heated Oxygen Sensor (HO2S) Low Signal - Bank 1 Sensor 2 |
| 10 | 0.8 TN | 1671 | Heated Oxygen Sensor (HO2S) Low Signal - Bank 2 Sensor 2 |
| 11-12 | - | - | Not Used |
| 13 | 0.5 YE | 5991 | Powertrain Relay Control |
| 14 | - | - | Not Used |
| 15 | 0.8 GY/WH | 3122 | Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 1 Sensor 2 |
| 16 | 0.8 OG/WH | 3223 | Heated Oxygen Sensor (HO2S) Heater Low Control - Bank 2 Sensor 2 |
| 17 | 0.8 PU/WH | 1668 | Heated Oxygen Sensor (HO2S) High Signal - Bank 1 Sensor 2 |
| 18 | 0.35 L-BU | 1162 | Accelerator Pedal Position (APP) Sensor 2 Signal |
| 19 | 0.5 PK | 439 | Ignition Voltage |
| 20 | 0.5 RD/WH | 440 | Battery Positive Voltage |
| 21 | 0.35 PU | 1272 | Low Reference |
| 22-23 | - | - | Not Used |
| 24 | 0.5 TN/BK | 6049 | Low Reference |
| 25 | 0.35 OG/BK | 380 | A/C Refrigerant Pressure Sensor Signal (C60) |
| 26 | - | - | Not Used |
| 27 | 0.35 BN/WH | 419 | MIL Control |
| 28-29 | - | - | Not Used |
| 30 | 0.35 D-GN/WH | 459 | A/C Compressor Clutch Relay Control (C60) |
| 31 | - | - | Not Used |
| 32 | 0.35 YE/BK | 625 | Starter Enable Relay Control |
| 33-34 | - | - | Not Used |
| 35 | 0.8 TN | 2760 | Low Reference |
| 36 | - | - | Not Used |
| 37 | 0.5 YE | 492 | Mass Air Flow (MAF) Sensor Signal |
| 38 | - | - | Not Used |
| 39 | 0.5 PU | 1589 | Fuel Level Sensor Signal - Primary |
| 40 | - | - | Not Used |
| 41 | 0.35 BN | 1271 | Low Reference |
| 42 | 0.5 D-GN | 890 | Fuel Tank Pressure Sensor Signal |
| 43 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus (+) |
| 44 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus (-) |
| 45-46 | - | - | Not Used |
| 47 | 0.35 WH/BK | 1164 | 5-Volt Reference 2 |
| 48-49 | - | - | Not Used |
| 50 | 0.35 YE/BK | 1827 | Vehicle Speed Signal |
| 51-53 | - | - | Not Used |
| 54 | 0.5 OG/BK | 6399 | Replicated TOS Signal |
| 55 | 0.5 L-BU/WH | 6311 | Torque Converter Clutch (TCC) Brake Signal |
| 56 | - | - | Not Used |
| 57 | 0.35 OG/BK | 1786 | Ignition Lock Cylinder Control Actuator Signal |
| 58 | 0.5 TN | 472 | Intake Air Temperature (IAT) Sensor Signal |
| 59-64 | - | - | Not Used |
| 65 | 0.35 GY | 2700 | 5-Volt Reference 1 (C60) |
| 66 | 0.5 GY | 2709 | 5-Volt Reference 1 |
| 67 | 0.35 TN | 1274 | 5-Volt Reference 1 |
| 68-69 | - | - | Not Used |
| 70 | 0.5 WH | 1310 | Evaporative Emission (EVAP) Canister Vent Solenoid Control |
| 71-72 | - | - | Not Used |
| 73 | 0.5 PK | 1339 | Ignition Voltage |
Connector Part Information
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Terminal Part Information
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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.