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Symptoms - Cellular Communication

Symptoms - Cellular Communication


Note

The following steps must be completed before using the symptom table.



1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:

There are no DTCs set.

The control modules can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to OnStar Description and Operation .


Visual/Physical Inspection


Inspect for aftermarket devices which could affect the operation of the radio/audio system. Refer to Checking aftermarket accessories .

Inspect for easily accessible or visible system components for obvious damage or conditions which may cause the symptom.


Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:


Bluetooth Malfunction

No Global Positioning System (GPS) Reception

OnStar Microphone Malfunction

OnStar Audio Malfunction

OnStar Button LED Malfunction

OnStar Call Center Remote Function Requests Malfunction

OnStar Button Malfunction

Unable to Contact OnStar Call Center

OnStar Voice Recognition Malfunction

OnStar Steering Wheel Control Functions Malfunction