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 B2462: No Navigation Signal
- DTC B2476: Low Reference Circuit Voltage To The VIU Low
- DTC U1500: No Communication Between The VIU And The VCU
- Symptoms - Cellular Communication
- OnStar One or More Buttons Inoperative
- OnStar Cannot Control Horns, Door Unlock, or Exterior Lamps
- Unable to Contact OnStar Call Center
- OnStar Call Center Unable to Configure OnStar (R) System
- Microphone Inoperative - Caller Cannot Be Heard
- Voice Recognition Inoperative
- OnStar Button LED Inoperative
- No (or Noisy) OnStar Audio
- OnStar Reprogramming
- Repair Instructions
- Description and Operation