K 1500 Suburban 4WD V8-5.3L VIN Z Flex Fuel (2003)
Control Assembly: Service and Repair
HVAC System - Automatic
HVAC Control Module
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
1. Connect the electrical connectors to the HVAC control module.
IMPORTANT: The Key should be in the off position when connecting the electrical connectors to ensure proper calibration.
2. Install the HVAC control module into the instrument panel, ensuring that the HVAC control module retaining tabs lock into place.
3. Install the screws from the HVAC control module.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the screws to 1.9 N.m (17 lb in).
4. Install the instrument panel accessory trim plate.
5. Start the vehicle and let run for one minute.
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.
