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 MANUALSCHEVROLET2005SILVERADO SS V8-6.0L VIN NREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL ASSEMBLYSERVICE AND REPAIRHVAC SYSTEM - AUTOMATIC
2005 Chevrolet Silverado SS V8-6.0L VIN N
HVAC System - Automatic
2005 Chevrolet Silverado SS V8-6.0L VIN NSECTION HVAC System - Automatic
HVAC Control Module Replacement
Removal Procedure
1. Remove the instrument panel accessory trim plate. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement Service and Repair.
2. Remove the screws from the HVAC control module.
3. Depress the control assembly retaining tabs and remove the HVAC control module from the instrument panel.
4. Disconnect the electrical connectors from the HVAC control module.
Installation Procedure
Important: The key should be in the OFF position when connecting the electrical connectors to ensure proper calibration.
1. Connect the electrical connectors to the HVAC control module.
2. Install the HVAC control module into the instrument panel, ensuring that the HVAC control module retaining tabs lock into place.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
3. Install the screws from the HVAC control module.
Tighten
Tighten the screws to 1.9 Nm (17 lb in).
4. Install the instrument panel accessory trim plate. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement Service and Repair.
Important: Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating. If interrupted improper HVAC performance will result.
5. Start the vehicle and let run for one minute.
6. Refer to Control Module References for programming and setup information Programming and Relearning.
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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.