Circuit/System Verification

WARNING: This page is about a different car, the 2013 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

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

Ignition ON.
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 A10 inside rearview mirror.
- If all of the buttons operate normally
All OK.