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Circuit/System Verification

IMPORTANT:

It is important to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from the satellites. It is also necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.

  1. Ignition ON, observe the GPS signal status indicator for at least 10 seconds with a scan tool. The indicator should display Yes.
    • If the indicator does not display Yes, refer to Circuit/System Testing.
  2. Call and verify the OnStar advisor has received the GPS data.
    • If the advisor did not receive the GPS data and the call was a "fail to voice", contact the GM Technical Assistance Center.
    • If the advisor did not receive the GPS data and the call was not a "fail to voice", refer to Circuit/System Testing.
  3. Verify with the OnStar Call Center advisor that your actual position is within a reasonable distance from the actual location of the vehicle.
    • If your actual position is not within a reasonable distance from the actual location of the vehicle, replace the vehicle communication interface module.
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