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.
Transfer Case Shift Control Module X1
2008 Pontiac Grand Prix BaseSECTION Transfer Case Shift Control Module X1
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 | 0.35 YE/RD | 7122 | Differential Lock Switch Signal |
| 3 | 0.5 PK | 239 | Ignition 1 Voltage |
| 4 | 1 OG/BK | 7121 | Low Reference |
| 5 | 1 L-BU/WH | 7120 | Differential Lock Actuator Control |
| 6 | 0.35 D-BU | 5985 | Accessory Wakeup Serial Data |
| 7 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 8 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 9 | 0.35 L-GN | 7119 | 5-Volt Reference |
| 15 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 16 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
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.