GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Mobile Telephone Microphone Replacement

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

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

    3. Object Number: 754990 Size: SH
  3. If only the microphone removal is required, disengage the quick release tab (1) and remove the OnStar® microphone from the overhead console.
  4. 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. Caution: Refer to Fastener Caution in the Preface section.

  2. Install the 2 OnStar® microphone retaining screws.

    3. Tighten
    Tighten the screws to 0.8 N·m (7 lb in).

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

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