Unable To Contact Call Center - OnStar

TEST DESCRIPTION

Steps 1-10:

The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if the Vehicle Communication Interface Module is connecting to the Onstar(R) Call Center. If any message other than "Unable to connect to OnStar" is played through the audio system, the problem is not within the vehicle and the supporting cellular system and/or carriers may be at fault.
3. A bad cellular connection may cause the Vehicle Communication Interface module to fail to connect to the OnStar(R) Call Center.