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Fault diagnosis, fault symptoms

📄 No GPS data

📄 Voice control not working.

📄 Telephone not working properly. No diagnostic trouble codes stored.

📄 OnStar keypad, one or more buttons do not work.

📄 Cannot contact OnStar Call Center (OCC)

📄 Microphone out of order

📄 Voice activation, poor function

📄 LED on keypad, defective function

📄 GPS data defective