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 MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHVAC SYSTEM - AUTOMATICCOMPONENT LOCATORHVAC CONNECTOR END VIEWSHVAC CONTROL MODULE
2001 Chevrolet Suburban C1500
HVAC Control Module
2001 Chevrolet Suburban C1500SECTION HVAC Control Module
HVAC Control Module
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| C1 | LT BLU/BLK | 590 | Sunload Sensor Signal |
| C2 | BRN | 404 | Upper Air Temperature Sensor Signal |
| C3 | LT GRN | 405 | Lower Air Temperature Sensor Signal |
| C4 | LT BLU | 733 | Temperature Actuator Position Signal |
| C5 | PPL | 1838 | Recirculation Door Position Signal |
| C6 | BRN | 341 | Ignition 3 Voltage |
| C7 | DK GRN | 1614 | Recirculation Door Control |
| C8 | WHT | 119 | Mode Door Control |
| C9 | DK BLU | 1199 | Air Temperature Door Control |
| C10 | BLK | 2450 | Ground |
| C11 | WHT | 1038 | HVAC Class 2 Serial Data |
| C12 | ORN | 340 | Battery Positive Voltage |
| C13-C15 | - | - | Not Used |
| C16 | GRY/BLK | 754 | Blower Motor Speed Control |
| D1 | DK GRN | 734 | Inside Air Temperature Sensor Signal |
| D2 | LT GRN/BLK | 735 | Ambient Air Temperature Sensor Signal |
| D3 | RED | 708 | Mode Door Position Signal |
| D4 | - | - | Not Used |
| D5 | GRY | 598 | 5 Volt Reference |
| D6 | - | - | Not Used |
| D7 | GRY | 8 | Instrument Panel Lamp Supply Voltage - 1 |
| D8 | LT BLU | 203 | A/C Request Signal |
| D9 | BRN | 718 | Low Reference |
| D10 | GRY/BLK | 1798 | Ground |
| D11 | LT BLU | 2820 | HVAC Control Module Clock Signal |
| D12 | RED | 2819 | HVAC Control Module Data Signal |
| D13 | - | - | Not Used |
| D14 | WHT | 193 | Rear Defog Relay Control |
| D15-D16 | - | - | Not Used |
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.