GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

The electric actuator (temperature) is located on the top right hand side of the heater/vent module.

  1. Remove the instrument panel carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges, and Console.

  2. Object Number: 424782  Size: SH
  3. Disconnect the electrical connector.

  4. Object Number: 404930  Size: SH
  5. Remove the electric actuator retaining screws.
  6. Remove the electric actuator from the heater/vent module.

Installation Procedure


    Object Number: 404930  Size: SH
  1. Install the electric actuator to the heater/vent module. Ensure that the actuator is seated on the locating tab.
  2. 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 electric actuator retaining screws.
  4. Tighten
    Tighten to 1.9 N·m (17 lb ft).


    Object Number: 424782  Size: SH
  5. Connect the electrical connector.
  6. Install the instrument panel carrier. Refer to Instrument Panel Carrier Replacement in Instrument Panel, Gauges, and Console.
  7. Perform the following procedure in order to Initialize the electric actuator on vehicles equipped with automatic climate control (C68).
  8. 5.1. Turn the ignition switch to the OFF position.
    5.2. Remove the RDO BATT fuse for 10 seconds.
    5.3. Reinstall the RDO BATT fuse.
    5.4. Turn the ignition switch to the ON position.
    5.5. Ensure that the electric actuator cycles through the hot and cold range.
  9. Perform a heater output temperature check. Refer to Heater Output Temperature Check .