GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the overhead console. Refer to Roof Console Replacement .

  2. Object Number: 741633  Size: SH
  3. Disconnect the microphone electrical connector to the OnStar® microphone (1).

  4. Object Number: 754990  Size: SH
  5. If only the microphone removal is required, disengage the quick release tab (1) and remove the OnStar® microphone from the overhead console.
  6. If removing the mounting bracket is required, remove the 2 retaining screws to the OnStar® microphone and remove the bracket from the overhead console.

Installation Procedure


    Object Number: 754990  Size: SH
  1. If installation of the mounting bracket is required, install the mounting bracket to the overhead console.
  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 2 OnStar® microphone retaining screws.
  4. Tighten
    Tighten the screws to 0.8 N·m (7 lb in).

  5. Install the microphone to the mounting bracket ensuring the quick release tab (1) is fully seated.

  6. Object Number: 741633  Size: SH
  7. Connect the electrical connector to the OnStar® microphone (1).
  8. Install the overhead console. Refer to Roof Console Replacement .