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 17 (HVAC - AUTOMATIC)COMPONENT LOCATORHVAC CONNECTOR END VIEWSHVAC CONTROL MODULE - C1
2008 Pontiac Grand Prix Base
HVAC Control Module - C1
2008 Pontiac Grand Prix BaseSECTION HVAC Control Module - C1
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module - C1 Connector Parts Information
Connector Part Information
|
HVAC Control Module - C1 Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A1 | D-GN | 1614 | Recirculation Door Control |
| A2 | D-BU | 1646 | Right Air Temperature Door Position Signal |
| A3 | L-BU | 733 | Left Air Temperature Door Position Signal |
| A4 | - | - | Not Used |
| A5 | L-GN | 2275 | Mode Door Position Signal |
| A6 | - | - | Not Used |
| A7 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| A8 | BK/WH | 1851 | Ground |
| A9-A11 | - | - | Not Used |
| A12 | D-BU | 204 | A/C Low Pressure Sensor Signal |
| B1 | WH/BK | 1236 | Right Air Temperature Door Control |
| B2 | D-BU | 1199 | Left Air Temperature Door Control |
| B3 | - | - | Not Used |
| B4 | TN | 2273 | Mode Door Control |
| B5 | BN | 341 | Ignition 3 Voltage |
| B6 | YE | 1791 | Low Reference |
| B7 | OG | 4340 | Battery Positive Voltage |
| B8 | L-BU/BK | 1688 | 5-Volt Reference |
| B9 | BK | 1050 | Ground |
| B10 | - | - | Not Used |
| B11 | WH | 1038 | HVAC Class 2 Serial Data |
| B12 | - | - | Not Used |
RENDER: 1.0x
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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.