Circuit/System Verification
NOTE:
Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.
Ignition ON, press the OnStar® Call buttons one at the time. Verify that all of the OnStar® buttons operate normally.
- If some OnStar® buttons are inoperative but not all, replace the inside rearview mirror.
- If none of the OnStar® buttons operate, refer to circuit/system testing.