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.
Body Control Module (BCM) X3
2008 Pontiac Grand Prix BaseSECTION Body Control Module (BCM) X3
WARNING: This page is about a different car, the 2008 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Connector Part Information
|
Terminal Part Information
|
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | 0.8 BK/WH | 1851 | Ground |
| 2 | 0.8 RD/WH | 2140 | Battery Positive Voltage |
| 3 | 0.8 RD/WH | 3840 | Battery Positive Voltage |
| 4 | - | - | Not Used |
| 5 | 0.8 BK/WH | 1851 | Ground |
| 6-7 | - | - | Not Used |
| 8 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 9 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 10 | 0.35 D-GN | 5060 | Low Speed GMLAN Serial Data |
| 11 | 0.35 D-GN | 44 | Instrument Panel Lamps Dimmer Switch Signal |
| 12 | 0.35 OG/WH | 812 | 12-Volt Reference |
| 13 | 0.35 PU | 7062 | Brake Switch Signal |
| 14-15 | - | - | Not Used |
| 16 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 17 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 18 | 0.35 YE | 6817 | LED Dimming Supply |
| 19 | 0.5 L-BU | 5986 | Serial Data Communication Enable |
| 20-21 | - | - | Not Used |
| 22 | 0.35 L-GN/WH | 7158 | Cruise Control Indicator Dimming Control |
| 23-24 | - | - | Not Used |
| 25 | 0.35 PU/WH | 6816 | Indicator Dimming Control |
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.