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 Definitions
- 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) Sensor Circuit
- DTC U1500: Inter-Device Dedicated Bus Malfunction
- OnStar Symptom Diagnosis
- Symptoms - Cellular Communication
- OnStar Call Center Lock/Unlock Commands Inoperative
- Unable to Contact OnStar Call Center
- 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