Cellular Communication System
- 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 Phone Microphone Circuit
- DTC B2470: Cellular Phone Antenna Circuit
- DTC B2476: Cellular Phone Select Service Switch
- DTC B2482: Cellular Phone Select Service Switch Range/Performance
- DTC B2483 or B2484: Global Positioning System (GPS) Antenna Circuit
- DTC U1500: Inter-device Dedicated Bus 1
- OnStar Symptom Diagnosis
- 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 Steering Wheel Control Functions Inoperative
- OnStar Button LED Inoperative
- No (or Noisy) OnStar Audio
- Global Positioning System (GPS) Data Not Current or Inaccurate
- Repair Instructions
- Description and Operation