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 MANUALSPONTIAC2008GRAND PRIX BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 273 (COMPONENT LOCATIONS & CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSHVAC CONTROL MODULE X3
2008 Pontiac Grand Prix Base
HVAC Control Module X3
2008 Pontiac Grand Prix BaseSECTION HVAC Control Module 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 | 0.35 TN | 518 | Lower Left Air Temperature Sensor Signal |
| 2 | 0.35 YE/BK | 713 | Defrost/Heater Mode Valve Position Sensor Signal |
| 3 | 0.35 PU | 1838 | Recirculation Door Position Signal |
| 4 | 0.35 GY/BK | 754 | Blower Motor Speed Control |
| 5-9 | - | - | Not Used |
| 10 | 0.35 GY | 598 | 5-Volt Reference |
| 11 | 0.35 TN | 520 | Lower Right Air Temperature Sensor Signal |
| 12 | 0.35 L-BU | 733 | Left Air Temperature Door Control |
| 13 | 0.35 D-BU | 1646 | Right Air Temperature Door Position Signal |
| 14 | - | - | Not Used |
| 15 | 0.35 TN | 2273 | Mode Door Control |
| 16 | 0.35 D-BU | 1199 | Auxiliary Air Temperature Door Position Signal |
| 17 | 0.35 D-GN | 1614 | Recirculation Door Control |
| 18 | 0.35 WH/BK | 1236 | Right Air Temperature Door Control |
| 19 | - | - | Not Used |
| 20 | 0.35 YE | 1791 | Low Reference |
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.