TrailBlazer 2WD L6-4.2L VIN S (2003)
Control Module HVAC: Service and Repair
Control Module HVAC
HVAC Control Module Replacement
Removal Procedure
1. Remove the I/P accessory trim plate.
2. Remove the HVAC control module screws.
3. Depress the HVAC control module tabs (3) and remove the HVAC control module (2) from the I/P (4).
4. Disconnect the electrical connectors (1) from the HVAC control module (2).
Installation Procedure
1. Connect the electrical connectors (1) to the HVAC control module (2).
Important: Ensure that the HVAC control module tabs (3) lock into place.
2. Install the HVAC control module (2) into the I/P (4).
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 HVAC control module screws. Tighten the screws to 1.9 Nm (17 in. lbs.).
4. Install the I/P accessory trim plate.
