HVAC Control Module X3 (C67, C42, CJ2 or MEX)
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module X3 (C67, C42, CJ2 or MEX)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | 0.35 TN | 518 | Lower Left Air Temperature Sensor Signal (CJ2) |
| 2 | 0.35 YE/BK | 713 | Defrost/Heater Mode Valve Position Sensor Signal |
| 3 | 0.35 PU | 1838 | Recirculation Door Position Signal (CJ2) |
| 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 (CJ2) |
| 12 | 0.35 L-BU | 733 | Air Temperature Door Position Signal (CJ2) |
| 13 | 0.35 D-BU | 1646 | Right Air Temperature Door Position Signal |
| 14 | 0.5 D-BU | 204 | A/C Refrigerant Pressure Sensor Signal (HP2) |
| 0.35 WH | 2622 | Evaporator Temperature Sensor Signal (except HP2) | |
| 15 | 0.35 TN | 2273 | Mode Door Control |
| 16 | 0.35 D-BU | 1199 | Left Air Temperature Door Control (CJ2) |
| 17 | 0.35 D-GN | 1614 | Recirculation Door Control (CJ2 or C67 except MEX, or MEX without C42) |
| 18 | 0.35 WH/BK | 1236 | Right Air Temperature Door Control |
| 19 | 0.5 TN | 914 | Low Reference (HP2) |
| 0.35 TN | 552 | Low Reference (C67) | |
| 20 | 0.35 YE | 1791 | Low Reference |
Connector Part Information
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Terminal Part Information
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