Cellular Communication System
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Cellular Communication Component Views
- OnStar Keypad
- Overhead Console
- Global Positioning System Antenna Connection
- Rear Floor
- Right B Pillar
- Headliner
- Global Positioning System Antenna
- Cellular Cable to Vehicle Communication Interface Module (VCIM)
- Rear Floor and C Pillar
- Cellular Antenna
- Vehicle Communication Interface Module (VCIM), Short Wheelbase, Body Type VIN = 3
- Vehicle Communication Interface Module (VCIM), Long Wheelbase, Body Type VIN = 6
- Cellular Communication Connector End Views
- Cellular Communication Component Views
- 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: Open In Cellular Microphone Low Reference Circuit, Or A Short To Voltage In Cellular Microphone Signal Circuit
- DTC B2470: Vehicle Communication Interface Module Does Not Detect A Cellular Signal
- DTC B2476: Keypad Signal Circuit Voltage Low
- DTC B2482: A Button Is Depressed Or Stuck For More Than 15 Seconds
- DTC B2483 or B2484: Vehicle Communication Interface Module 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
- 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
- Coaxial Cable Replacement - Cellular Telephone (Envoy, Bravada)
- Coupling Replacement - Antenna Inner
- Coupling Replacement - Antenna Outer
- Navigation Antenna Replacement
- Antenna Bracket Replacement
- OnStar Button Assembly Replacement
- Communication Interface Module Replacement (TrailBlazer, Envoy, Bravada)
- Communication Interface Module Replacement (TrailBlazer EXT, Envoy XL)
- Navigation Control Processor Bracket Replacement (TrailBlazer, Envoy, Bravada)
- Navigation Control Processor Bracket Replacement (TrailBlazer EXT, Envoy XL)
- OnStar Microphone Replacement
- 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 a Phone Number Hands Free
- Operation of the OnStar® Speech Recognition Systems
- OnStar Description and Operation