Circuit/System Verification

NOTE:

It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.
The vehicle should be located in a quiet area.

Ignition ON/vehicle in Service Mode, press the blue OnStar® Call button.
Verify that your voice is heard clearly by the OnStar® Call center.
- If your voice can not be heard clearly
  Refer to OnStar Microphone Malfunction
- If your voice can be heard clearly
Verify that the system responds appropriately to all voice commands by pressing the voice command button and attempting to operate the system using multiple voice commands.
- If the OnStar® system does not respond to any voice commands
  Replace the K73 Telematics Communication Interface Control Module
- If the OnStar® system responds to some, but not all voice commands
  Refer to OnStar Description and Operation for tips on proper pronunciation.
- If the OnStar® system responds to all voice commands
All OK.