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 List
- DTC B2455 (Gen. 4): Open In Drain Wire Circuit Or A Short To Voltage In Cellular Microphone Signal Circuit
- DTC B2455 (Gen. 5): Open In Drain Wire Circuit Or A Short To Voltage In Cellular Microphone Signal Circuit
- DTC B2470: VCIM Does Not Detect A Cellular Signal
- DTC B2476: Keypad Signal Circuit Voltage
- DTC B2482: A Button Is Depressed Or Stuck For More Than 15 Seconds
- DTC B2483 or B2484: VCIM Does Not Detect A Navigation Signal
- DTC U1500: VCIM Detects An Internal Communication Malfunction
- OnStar Symptom Diagnosis
- Symptoms - Cellular Communication
- OnStar® One Or More Buttons Inoperative
- Unable to Contact OnStar® Call Center
- Microphone Inoperative - Caller Cannot Be Heard (Gen. 4)
- Microphone Inoperative - Caller Cannot Be Heard (Gen. 5)
- Voice Recognition Inoperative
- OnStar® Button LED Inoperative
- No (or Noisy) OnStar® Audio
- Global Positioning System (GPS) Data Not Current or Inaccurate
- Repair Instructions
- Description and Operation
- OnStar Description and Operation
- Notes
- Vehicle Communication Interface Module (VCIM)
- OnStar® Button Assembly
- OnStar® Microphone
- Cellular and Navigation Antennas
- OnStar® Reconfiguration Procedure
- OnStar® Cellular, GPS, and Diagnostic Limitations
- Operation of the Hands Free Cellular Phone
- Dialing Phone Number Hands Free
- Operation of the OnStar® Speech Recognition Systems
- General Tips For Better Speech Recognition
- Personal Calling Command
- OnStar Description and Operation