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Mobile Telephone Microphone Replacement

WARNING: This page is about a different car, the 2010 GMC Canyon and 2010 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View of OnStar(R) Microphone
GM1698635Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Mobile Telephone Microphone Assembly
Tip: 
  1. Disengage the tabs of the microphone assembly from the inside rearview mirror assembly using a small flat bladed tool.
  2. Disconnect the electrical connector.