Skip to content
Tahoe / Yukon Service Manual

Symptoms - Cellular Communication

Cellular, Entertainment, and Navigation | Diagnostic Information and Procedures | Document ID: 5453819

  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. Inspect for easily accessible or visible system components for obvious damage or conditions which could 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 Cellular Telephone Microphone Malfunction OnStar Button LED Malfunction OnStar Call Center Remote Function Requests Malfunction OnStar Button Malfunction Unable to Contact OnStar Call Center