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 (F1)
- Scan Tool Data Definitions (F1)
- Diagnostic Trouble Code (DTC) List (F1)
- DTC B2455: Cellular Microphone Signal
- DTC B2470: Vehicle Communication Interface Module Detects No Cellular Signal
- DTC B2476 (F1): Keypad Signal Circuit Voltage Less Than 2.8 Volts
- DTC B2482: 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 (F1)
- OnStar One or More Buttons Inoperative (F1)
- Unable to Contact OnStar Call Center (F1)
- Microphone Inoperative - Caller Cannot Be Heard (F1)
- Voice Recognition Inoperative
- OnStar Button LED Inoperative (F1)
- No (or Noisy) OnStar Audio (F1)
- Repair Instructions
- Description and Operation