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Circuit/System Verification

NOTE:

Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.

  1. Ignition ON/vehicle in Service Mode.
  2. Verify no DTCs are set.
    • Go to next step: If no DTCs are set 
  3. Verify that each button of the S51 Telematics Button Assembly operates normally by pressing each button individually.
    • If none of the buttons operate normally 

      Refer to Circuit/System Testing.

    • If some, but not all, of the buttons operate normally 

      Test or replace the S51 Telematics Button Assembly.

    • Go to next step: If all of the buttons operate normally 
  4. All OK.
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