Cellular Communication System

• Specifications
  • Fastener Tightening Specifications
• Schematic and Routing Diagrams
  • OnStar® Schematics
• Component Locator
  • Cellular Communication Component Views
    • Front Lights (X88)
    • Front Lighting (Z88/Z89)
    • Front Lighting (W49)
    • Overhead Console
    • Vehicle Communication Interface Module (VCIM) - Short Wheelbase (SWB)
    • Vehicle Communication Interface Module (VCIM) Component View (Long Wheelbase)
  • Cellular Communication Connectors
    • Cellular Microphone
    • Vehicle Communication Interface Module (VCIM) C1
    • Vehicle Communication Interface Module (VCIM) C2
• Diagnostic Information and Procedures
  • Notes
  • Diagnostic Starting Point - Cellular Communication
  • Scan Tool Data List
  • Scan Tool Data Definitions
  • DTC B1001: Option Configuration Error
    • Circuit Description
    • DTC Descriptor
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
  • DTC B2455: Cellular Phone Microphone Circuit
    • Circuit Description
    • DTC Descriptor
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2470: Cellular Phone Antenna Circuit Malfunction
    • Circuit Description
    • DTC Descriptor
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2476: Cellular Phone Select Service Switch Malfunction (3 Button Assembly)
    • Circuit Description
    • DTC Descriptor
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2482: Cellular Phone Select Switch Range/Performance
    • Circuit Description
    • DTC Descriptor
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Test Description
  • DTC B2483, B2484: GPS Sensor Circuit Low, GPS Sensor Circuit Open
    • Circuit Description
    • DTC Descriptors
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
  • DTC U1500: Inter-Device Dedicated Bus Malfunction
    • Circuit Description
    • DTC Descriptor
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
  • OnStar® Symptom Diagnosis
    • System Description
    • Diagnostic Aids
  • Symptoms - Cellular Communication
    • Notes
    • Visual/Physical Inspection
    • Intermittent
    • Symptom List
  • OnStar® One or More Buttons Inoperative
  • OnStar® Call Center Remote Function Requests Inoperative
    • Diagnostic Aids
  • Unable to Contact OnStar® Call Center
    • Diagnostic Aids
  • Microphone Inoperative - Caller Cannot Be Heard
  • Voice Recognition Inoperative
  • OnStar® Steering Wheel Control Functions Inoperative
  • OnStar® Button LED Inoperative
    • Test Description
  • No (or Noisy) OnStar® Audio
    • Test Description
  • Global Positioning System (GPS) Data Not Current or Inaccurate
    • Diagnostic Aids
  • OnStar® Reconfiguration (Gen 6)
  • OnStar® Reconfiguration (Gen 6.1)
• Repair Instructions
  • Antenna Assembly Replacement - Cellular and Navigation
    • Removal Procedure
    • Installation Procedure
  • OnStar® Button Assembly Replacement
  • Communication Interface Module Replacement (TrailBlazer EXT, Envoy XL)
    • Removal Procedure
    • Installation Procedure
  • Communication Interface Module Replacement (Trailblazer, Envoy, Rainier)
    • Removal Procedure
    • Installation Procedure
  • Navigation Control Processor Bracket Replacement (TrailBlazer EXT, Envoy XL)
    • Removal Procedure
    • Installation Procedure
  • Navigation Control Processor Bracket Replacement (Trailblazer, Envoy, Rainier)
    • Removal Procedure
    • Installation Procedure
  • OnStar® Microphone Replacement
    • Removal Procedure
    • Installation Procedure
• Description and Operation
  • OnStar® Description and Operation
    • Notes
    • Vehicle Communication Interface Module (VCIM)
    • OnStar® Button Assembly
    • OnStar® Microphone
    • Cellular and Navigation Antennas
    • OnStar® Sleep Cycle
    • Deactivated OnStar® Accounts
    • OnStar® Reconfiguration Procedure
    • OnStar® Cellular, GPS, and Diagnostic Limitations
    • OnStar® Personal Calling
    • Operation of the Hands Free Cellular Phone
    • OnStar® Steering Wheel Controls
    • OPC Features
    • Voice Feedback
    • OPC Security/System Lock
    • Nametags
    • Mobile Identification Number and Mobile Directory Number
    • Placing a Call
    • Operation of the OnStar® Speech Recognition Systems