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) C3
Connector Part Information
OEM: HITPB-25-C-LE
Service: -
Description: 25-Way F HIT Series (L-BU)
Terminal Part Information
Pins: 1, 2, 3, 5
Terminal/Tray: SNAC-A061T-M2.8/20
Core/Insulation Crimp: E/A
Release Tool/Test Probe: 12094429/J-35616-4A (PU)
Pins: 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22
Terminal/Tray: SNAC3-A021T-M0.64/20
Core/Insulation Crimp: J/J
Release Tool/Test Probe: 12094429/J-35616-64B (L-BU)
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| 1 | BK/WH | 1551 | Ground |
| 2 | RD/WH | 240 | Battery Positive Voltage |
| 3 | RD/WH | 1040 | Battery Positive Voltage |
| 4 | - | - | Not Used |
| 5 | BK/WH | 1551 | Ground |
| 6 | - | - | Not Used |
| 7 | YE | 749 | Security Indicator Control |
| 8 | TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 9 | TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 10 | D-GN | 5060 | Low Speed GMLAN Serial Data |
| 11 | D-GN | 44 | Instrument Panel Lamps Dimmer Switch Signal |
| 12 | OG/WH | 812 | 12-Volt Reference or IP Dimming Voltage Reference |
| 13 | D-BU | 6037 | Brake Pedal Displacement Sensor Signal |
| 14 | OG/BK | 6035 | Brake Pedal Displacement Sensor Low Reference |
| 15 | GY | 6036 | Brake Pedal Displacement Sensor 5 Volt Reference |
| 16 | TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 17 | TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 18 | PU/WH | 1382 | LED Dimming Signal/LED Dimming Supply |
| 19 | L-BU | 5986 | Serial Data Communication Enable |
| 20 | - | - | Not Used |
| 21 | OG | 192 | Front Fog Lamp Switch Signal/Fog Lamps Enable |
| 22 | GN/WH | 7158 | Cruise Control Indicator Dimming Signal |
| 23-25 | - | - | Not Used |
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.