GM Service Manual Online
For 1990-2009 cars only

OnStar Button Assembly Replacement Utility

Removal Procedure

  1. Remove the dash trim bezel. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement in Instrument Panel, Gages and Console.

  2. Object Number: 621461  Size: SH
  3. Grasp the OnStar® button assembly (1) and pull outwards to remove the button assembly.

  4. Object Number: 621462  Size: SH
  5. Disconnect the electrical connectors for the switches.
  6. Remove the switches and the button assembly (2).

Installation Procedure


    Object Number: 621462  Size: SH
  1. Reconnect the switches and button assembly (2) electrical connectors.

  2. Object Number: 621461  Size: SH
  3. Install the OnStar® button assembly (1) into the dash.
  4. Reinstall the dash trim bezel. Refer to Instrument Panel Cluster Trim Plate Bezel Replacement in Instrument Panel, Gages and Console.

OnStar Button Assembly Replacement Pick-Up


Object Number: 739398  Size: SH

The OnStar button assembly located on the rearview mirror can not be serviced separately from the rearview mirror. Should the button assembly need to be replaced, the entire rearview mirror assembly will need to be replaced. Refer to Inside Rearview Mirror Replacement in Stationary Windows.