GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 449578  Size: SH
  1. Disable the SIR system. Refer to Disabling the SIR System in SIR.
  2. Remove the left sound insulator. Refer to Instrument Panel Insulator Replacement .
  3. Disconnect the electrical connector.
  4. Remove the screws from the dimmer module (1).

Installation Procedure

    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.


    Object Number: 449578  Size: SH
  1. Install the screws to the dimmer module (1).
  2. Tighten
    Tighten the screws to 2 N·m (18 lb in)

  3. Connect the electrical connector.
  4. Install the left sound insulator. Refer to Instrument Panel Insulator Replacement .
  5. Enable the SIR system. Refer to Enabling the SIR System in SIR.