GM Service Manual Online
For 1990-2009 cars only

Mobile Telephone Microphone Replacement without Sunroof

Removal Procedure


    Object Number: 911225  Size: SH
  1. Lower the headliner enough to gain access to the opening in the overhead compartment. Refer to Headlining Trim Panel Replacement in Interior Trim.
  2. Disconnect the wire harness electrical connection (2) for the OnStar microphone (3).
  3. With a flat-bladed tool disengage the retaining tabs (4) on the microphone (3).

  4. Object Number: 911223  Size: SH
  5. Push the microphone (3) out of the overhead console (1).
  6. Route the electrical connector (2) through the opening in the overhead console (1).

Installation Procedure


    Object Number: 911223  Size: SH
  1. Route the electrical connector (2) through the opening in the overhead console (1).
  2. Align the retaining tabs on the microphone (3) to the splines on the overhead console (1).

  3. Object Number: 911225  Size: SH
  4. Push the microphone (3) into the overhead console (1) until the retaining tabs (4) are fully engaged.
  5. Connect the wire harness electrical connector (2) to the microphone (3).
  6. Install headliner to a desired appearance. Refer to Headlining Trim Panel Replacement in Interior Trim.

Mobile Telephone Microphone Replacement with Sunroof

Removal Procedure


    Object Number: 911222  Size: SH
  1. Lower the headliner enough to gain access to the OnStar microphone electrical connector. Refer to Headlining Trim Panel Replacement in Interior Trim.
  2. Disconnect the microphone wire harness electrical connector (3).
  3. With a flat-bladed tool remove the sunroof switch bezel (1) from the headliner.
  4. Disconnect the sunroof switch (4) electrical connector.
  5. Disengage the retaining tabs on the microphone (2).
  6. Push the microphone (2) out of the switch bezel (1).

Installation Procedure


    Object Number: 911222  Size: SH
  1. Align the microphone retaining tabs to the splines on the switch bezel (1).
  2. Push the microphone (2) into the switch bezel (1) until retaining tabs are fully engaged.
  3. Connect the electrical connector to the sunroof switch (4).
  4. Install the sunroof switch bezel (1) to the headliner assembly.
  5. Connect the microphone wire harness electrical connector (3).
  6. Return the headliner to a desired appearance. Refer to Headlining Trim Panel Replacement in Interior Trim.