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.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSBUICK2010LUCERNE CXL, 3.9 1REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 320 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - ENGINE CONTROL MODULE X2 THROUGH PRESSURE CONTROL SOLENOID)COMPONENT CONNECTOR END VIEWSHVAC CONTROL MODULE X2
2010 Buick Lucerne CXL, 3.9 1
HVAC Control Module X2
2010 Buick Lucerne CXL, 3.9 1SECTION HVAC Control Module X2
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module X2
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | - | - | Not Used |
| 2 | 0.35 L-BU | 733 | Driver Air Temperature Door Position Signal |
| 3 | 0.35 YE/BK | 1814 | Lower Mode Door Position Signal |
| 4 | 0.35 GY | 1548 | Right Sunload Sensor Signal |
| 5 | 0.35 L-BU/BK | 590 | Left Sunload Sensor Signal |
| 6 | 0.35 WH | 2622 | Evaporator Low Temperature Sensor Signal |
| 7 | 0.35 L-GN/BK | 735 | Ambient Air Temperature Sensor Signal |
| 8 | 0.35 D-GN | 734 | Inside Air Temperature Sensor Signal |
| 9 | - | - | Not Used |
| 10 | 0.35 D-BU | 1646 | Passenger Air Temperature Door Position |
| 11 | 0.35 L-BU/OG | 706 | Recirculation Valve Solenoid Signal |
| 12 | 0.35 PK | 2145 | Rear Air Temperature Door Position (CJ4) |
| 13 | 0.35 GY | 2599 | Rear Mode Door Position Signal (CJ4) |
| 14-16 | - | - | Not Used |
Connector Part Information
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Terminal Part Information
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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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.