Envoy 2WD V8-5.3L VIN M (2005)
Control Assembly: Service and Repair
HVAC System - Manual
HVAC Control Module
HVAC CONTROL MODULE REPLACEMENT
REMOVAL PROCEDURE
1. Remove the I/P accessory trim plate.
2. Remove the control module retaining screws.
3. Depress the HVAC control module retaining tabs (3) and remove the HVAC control module (2) from the instrument panel (4).
4. Disconnect the electrical connectors (1) from the HVAC control module (2).
INSTALLATION PROCEDURE
1. Connect the electrical connectors to the HVAC control module (2).
IMPORTANT: The key should be in the OFF position when connecting the electrical connectors to ensure proper calibration.
2. Install the HVAC control module (2) to the instrument panel (4), ensuring that the HVAC control module retaining tabs (3) lock into place.
3. Install the HVAC control module retaining screws.
Tighten the screws to 1.9 N.m (17 lb ft).
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the I/P accessory trim plate.
5. Start the engine and let run for 1 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.
