Sierra Classic 2500 4WD V8-6.0L (2007)
Control Assembly: Service and Repair
HVAC System - Automatic
HVAC Control Module Replacement
Removal Procedure
1. Remove the instrument panel accessory trim plate.
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: Refer to Fastener Notice.
3. Install the screws from the HVAC control module.
Tighten the screws to 1.9 N.m (17 lb in).
4. Install the instrument panel accessory trim plate.
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. See: Testing and Inspection/Programming and Relearning
