Cellular Communication System
- Specifications
- Schematic & Routing Diagrams
- Component Locator
- Diagnostic Information & 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 Detected
- DTC B2476: Keypad Signal Circuit Voltage
- DTC B2482: Button Is Depressed Or Stuck For More Than 15 Seconds
- DTC B2483 Or B2484: No 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 & Operation