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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALBODY ELECTRICALCOMPONENT LOCATIONS & COMPONENT CONNECTOR END VIEWSCOMPONENT CONNECTOR END VIEWBODY CONTROL MODULE (BCM) X4
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Body Control Module (BCM) X4
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Body Control Module (BCM) X4
Body Control Module (BCM) X4
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | 0.8 RD/WH | 2740 | Battery Positive Voltage |
| 2 | 0.8 RD/WH | 3040 | Battery Positive Voltage |
| 3 | 0.8 RD/WH | 2940 | Battery Positive Voltage |
| 4 | 0.8 RD/WH | 2240 | Battery Positive Voltage |
| 5 | 0.8 D-BU/WH | 1315 | Right Front Turn Signal Lamp Control |
| 6 | 0.35 D-GN | 6134 | Local Interconnect Network 3 |
| 7 | 0.35 YE | 196 | Windshield Wiper Motor Park Switch Signal |
| 8-11 | - | - | Not Used |
| 12 | 0.35 YE | 5187 | Right Trailer Turn Signal Lamp (UY7) |
| 13 | 0.35 OG | 5186 | Left Trailer Turn Signal Lamp (UY7) |
| 14 | - | - | Not Used |
| 15 | 0.35 OG | 2268 | Windshield Washer Relay Control |
| 16 | 0.35 TN/WH | 1969 | Headlamp High Beam Relay Control |
| 17-18 | - | - | Not Used |
| 19 | 0.5 D-BU | 5985 | Accessory Wakeup Serial Data |
| 20 | - | - | Not Used |
| 21 | 0.35 YE | 5199 | Run/Crank Relay Coil Control |
| 22 | - | - | Not Used |
| 23 | 0.35 PU | 544 | Headlamp Low Beam Control |
| 24-25 | - | - | Not Used |
Connector Part InformationÂ
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Terminal Part InformationÂ
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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.