Cellular Communication System
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Cellular Communication
- Diagnostic System Check - Cellular Communication
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B2455: Cellular Microphone Signal Circuit
- DTC B2470: No Cellular Signal
- DTC B2476: Keypad Signal Circuit Voltage
- DTC B2482: A Button Is Depressed Or Stuck For More Than 15 Seconds
- DTC B2483 or B2484: Vehicle Communication Interface Module Does Not Detect A Navigation Signal
- Symptoms - Cellular Communication
- OnStar One or More Buttons Inoperative
- Unable to Contact OnStar Call Center
- Microphone Inoperative - Caller Cannot Be Heard
- Voice Recognition Inoperative
- OnStar Button LED Inoperative
- No (or Noisy) OnStar Audio
- Repair Instructions
- Description and Operation