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 MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2172 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEW 3 OF 5)HVAC CONTROL MODULE X3 (CJ2)
2006 Chevrolet Suburban C2500, 6.0 U
HVAC Control Module X3 (CJ2)
2006 Chevrolet Suburban C2500, 6.0 USECTION HVAC Control Module X3 (CJ2)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
HVAC Control Module X3 (CJ2)
| Pin | Wire Color | 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 | Air Temperature Door Position Signal |
| 13 | 0.35 D-BU | 1646 | Auxiliary Air Temperature Door Position Signal (C69) |
| 14 | 0.5 D-BU | 204 | A/C Low Pressure Sensor Signal (HP2) |
| 15 | 0.35 TN | 2273 | Mode Door Control |
| 16 | 0.35 D-BU | 1199 | Air Temperature Door Control |
| 17 | 0.35 D-GN | 1614 | Recirculation Door Control |
| 18 | 0.35 WH/BK | 1236 | Auxiliary Air Temperature Door Control (C69) |
| 19 | 0.5 TN | 914 | Left Front Turn Signal Lamp Control (HP2) |
| 20 | 0.35 YE | 1791 | Low Reference |
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:
- • 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.