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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 131 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT VIEWS & COMPONENT CONNECTOR END VIEWS)ELECTRICAL CENTER IDENTIFICATION VIEWSBODY CONTROL MODULE (BCM) X1
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Body Control Module (BCM) X1
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Body Control Module (BCM) X1
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
Body Control Module (BCM) X1
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | - | - | Not Used |
| 2 | 0.35 L-GN/BK | 592 | DRL Relay Control |
| 3 | 0.35 D-GN/WH | 636 | Ambient Air Temperature Sensor Signal |
| 4 | 0.35 TN | 305 | Trunk Key Switch Signal |
| 5 | - | - | Not Used |
| 6 | 0.35 YE | 61 | Low Reference |
| 7-11 | - | - | Not Used |
| 12 | 0.5 BK | 1050 | Ground |
| 13 | 0.35 TN | 28 | Horn Relay Control |
| 14 | - | - | Not Used |
| 15 | 0.35 L-BU | 2182 | Reverse Lamp Relay Control |
| 16 | 0.35 L-BU | 1344 | Trunk Release Relay Control |
| 17 | - | - | Not Used |
| 18 | 0.35 OG/BK | 744 | Rear Compartment Lid Ajar Switch Signal |
| 19 | 0.35 YE | 317 | Fog Lamp Relay Control (T96) |
| 20-21 | - | - | Not Used |
| 22 | 0.35 D-GN | 113 | Windshield Wiper Switch Signal 2 |
| 23 | - | - | Not Used |
| 24 | 0.35 WH | 17 | Stop Lamp Supply Voltage |
| 25 | - | - | Not Used |
| 26 | 0.35 YE | 196 | Windshield Wiper Motor Park Switch Signal |
| 27-28 | - | - | Not Used |
| 29 | 0.35 TN/WH | 1969 | Headlamp High Beam Relay Control |
| 30-32 | - | - | Not Used |
| 33 | 0.35 BN/WH | 1571 | Traction Control Switch Signal (NW7/NW9) |
| 34 | - | - | Not Used |
| 35 | 0.35 L-GN | 262 | Driver Door Key Switch Signal |
| 36 | - | - | Not Used |
| 37 | 0.35 D-GN | 5060 | Low Speed GMLAN Serial Data |
| 38 | 0.35 L-BU | 14 | Left Turn Signal Lamps Supply Voltage |
| 39 | - | - | Not Used |
| 40 | 0.35 D-GN/WH | 1135 | A/T Shift Lock Control Solenoid Supply Voltage |
| 41 | - | - | Not Used |
| 42 | 0.35 WH | 17 | Stop Lamp Supply Voltage |
| 43-50 | - | - | Not Used |
| 51 | 0.35 GY/BK | 745 | Left Front Door Ajar Switch Signal |
| 52 | - | - | Not Used |
| 53 | 0.35 L-GN/BK | 748 | Passenger Door Ajar Switch Signal |
| 54 | 0.35 L-BU/BK | 747 | Passenger Door Ajar Switch Signal |
| 55 | 0.35 D-GN | 5060 | Low Speed GMLAN Serial Data |
| 56 | 0.35 D-BU | 15 | Right Turn Signal Lamps Supply Voltage |
| 57 | 0.35 WH | 193 | Rear Defog Relay Control |
| 58 | 0.35 YE | 5199 | Run/Crank Relay Coil Control |
| 59 | 0.35 L-BU | 1134 | Park Brake Switch Signal |
| 60 | 0.35 PK | 849 | Brake Fluid Level Sensor Signal |
| 61 | 0.35 D-GN | 5525 | Tap Up/Tap Down Enable Signal |
| 62 | 0.35 TN/WH | 99 | Windshield Washer Fluid Level Signal |
| 63-64 | - | - | Not Used |
| 65 | 0.35 WH | 1080 | Park Lamp Relay Control |
| 66 | 0.35 WH | 682 | Door Lock Lock/Unlock Signal |
| 67 | 0.35 WH | 682 | Door Lock Lock/Unlock Signal |
| 68 | - | - | Not Used |
| 69 | 0.35 PK/BK | 109 | Hood Ajar Switch Signal |
| 70 | 0.35 PU | 5531 | Hood Ajar Switch Signal |
| 71 | 0.35 BN/WH | 2091 | Trunk Release Switch Supply Voltage |
| 72 | 0.35 TN/WH | 746 | Passenger Door Ajar Switch Signal |
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.