Cellular System, Entertainment System, And Navigation System

• Specifications
  • Fastener Tightening Specifications
• Schematic and Routing Diagrams
  • Entertainment/Communication Schematic Icons
  • OnStar Schematics
  • Radio/Navigation System Schematics
  • Video System Schematics
• Component Locator
  • Entertainment/Communication Component Views
  • Entertainment/Communication Connectors
    • Audio Amplifier C1 (Except Y91)
    • Audio Amplifier C2 (Except Y91)
    • Audio Amplifier C3 (Except Y91)
    • Audio Amplifier C1 (Y91)
    • Audio Amplifier C2 (Y91)
    • Audio Amplifier C3 (Y91)
    • Audio Amplifier C1 (Z75)
    • Audio Amplifier C2 (Z75)
    • Audio Amplifier C3 (Z75)
    • Audio Amplifier C4 (Z75)
    • Audio/Video Adapter (U42)
    • Cellular Telephone Microphone (UE1)
    • Digital Radio Receiver (U2K)
    • Infrared Module (U42)
    • Noise Compensation Microphone
    • Radio C1 (Except Y91)
    • Radio C2 (Except Y91)
    • Radio C3 (Except Y91)
    • Radio C4 (Except Y91)
    • Radio C1 (Y91)
    • Radio C2 (Y91)
    • Radio C3 (Y91)
    • Radio C4 (Y91)
    • Rear Seat Audio (RSA) Controller C1 (UK6)
    • Rear Seat Audio (RSA) Controller C2 (UQ3)
    • Rear Seat Audio (RSA) Controller C2 (UQA/UQS)
    • Speaker - Center (UQS)
    • Speaker - Left D-Pillar (Except UQA/UQS)
    • Speaker - Left D-Pillar (UQA/UQS)
    • Speaker - LF Door (UQ3)
    • Speaker - LF Door (UQS/UQA)
    • Speaker - LF Tweeter
    • Speaker - LR Door (UQ3)
    • Speaker - LR Door (UQA/UQS)
    • Speaker - RF Door (UQ3)
    • Speaker - RF Door (UQS/UQA)
    • Speaker - RF Tweeter
    • Speaker - Right D-Pillar (Except UQA/UQS)
    • Speaker - Right D-Pillar (UQA/UQS)
    • Speaker - RR Door (UQ3)
    • Speaker - RR Door (UQA/UQS)
    • Speaker - Subwoofer
    • Vehicle Communication Interface Module (VCIM) C1
    • Vehicle Communication Interface Module (VCIM) C2
    • Vehicle Communication Interface Module (VCIM) C3
    • Video Display - Front (U42)
    • Video Display - Rear (DNU)
• Diagnostic Information and Procedures
  • Diagnostic Code Index
  • Diagnostic Starting Point - Entertainment
  • Scan Tool Output Controls
  • Scan Tool Data List
  • Scan Tool Data Definitions
  • DTC B0000
    • DTC Descriptor
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Testing
    • Repair Procedures
  • DTC B1001
    • 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 B1024
    • DTC Descriptor
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Verification
    • Circuit/System Testing
    • Repair Procedures
  • DTC B1025-B1095
    • DTC Descriptors
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Verification
    • Circuit/System Testing
    • Repair Procedures
  • DTC B1259
    • DTC Descriptors
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
    • Circuit/System Testing
    • Repair Procedures
  • DTC B1287
    • DTC Descriptors
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Verification
    • Circuit/System Testing
    • Repair Procedures
  • DTC B1288
    • DTC Descriptors
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Verification
    • Circuit/System Testing
    • Repair Procedures
  • DTC B1289
    • DTC Descriptors
    • Diagnostic Fault Information
    • Circuit/System Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Verification
    • Circuit/System Testing
    • Repair Procedures
  • DTC B2455
    • 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 B2462
    • DTC Descriptor
    • Diagnostic Fault Information
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Testing
    • Repair Procedures
  • DTC B2470
    • 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 B2474
    • DTC Descriptor
    • Diagnostic Fault Information
    • Circuit Description
    • Conditions for Running the DTC
    • Conditions for Setting the DTC
    • Action Taken When the DTC Sets
    • Conditions for Clearing the DTC
    • Diagnostic Aids
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Testing
    • Repair Procedures
  • DTC B2476
    • 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
    • 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 or B2484
    • 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
    • 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
  • Symptoms - Entertainment
    • Notes
    • Visual/Physical Inspection
    • Intermittent
    • Symptom List
  • Audio System Troubleshooting Hints
    • Notes
    • Preliminary Inspections
    • Identifying Concerns
    • Corrective Action
    • Generator Whine Concerns
  • Video Entertainment System Troubleshooting Hints
    • Notes
    • Video or Audio Distortion
    • Video Entertainment System Wireless Headphone Inoperative
    • Video Entertainment System Remote Control Inoperative
    • Discs Will Not Eject
  • Audio Distortion - One or More Speakers
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
      • Special Tools Required
    • Circuit/System Testing
    • Repair Procedures
  • Audio/Video Disc Player Adapter - Audio or Video Inoperative or Degraded Quality
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Digital Radio Poor or No Reception
    • Diagnostic Fault Information
    • Circuit/System Description
    • Reference Information
    • Circuit/System Verification
    • Circuit/System Testing
    • Repair Procedures
  • Digital Radio Receiver Setup
    • XM Activation
  • Global Positioning System (GPS) Data Not Current or Inaccurate
    • Diagnostic Aids
  • Microphone Inoperative - Caller Cannot Be Heard
  • Navigation System - Voice Guidance Inoperative or Degraded Quality
    • Notes
    • Diagnostic System Check - Vehicle
    • Voice Guidance Inoperative or Degraded
  • Navigation System - Voice Recognition Inoperative
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Testing
    • Repair Procedures
  • No (or Noisy) OnStar Audio
    • Test Description
  • No Global Positioning System (GPS) Reception
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
    • Circuit/System Testing
    • Repair Procedures
  • Noise Compensated Volume Inoperative
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • OnStar Button LED Inoperative
    • Test Description
  • OnStar Call Center Remote Function Requests Inoperative
    • Diagnostic Aids
  • OnStar One or More Buttons Inoperative
  • OnStar Reconfiguration
  • OnStar Steering Wheel Control Functions Inoperative
  • OnStar Symptom Diagnosis
    • System Description
    • Diagnostic Aids
  • Radio Audio Inoperative at Rear Seat Audio (RSA) Control
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Radio Controls Inoperative - Rear Seat
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Radio Displays CAL or CAL ERR
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
      • Special Tools Required
    • Circuit/System Testing
    • Repair Procedures
  • Radio Displays LOC, LOCKED, or CODE
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Radio Poor Reception
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing (With Antenna Mast)
    • Circuit/System Testing (With Side Rear Glass Antenna Grid)
    • Repair Procedures
  • Radio Setup
  • Reduced Volume - One or More Speakers
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
      • Special Tools Required
    • Circuit/System Testing
    • Repair Procedures
  • Speaker Replacement Reference
  • Speakers Inoperative - One or More
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
      • Special Tools Required
    • Circuit/System Testing
    • Repair Procedures
  • Unable to Contact OnStar Call Center
    • Diagnostic Aids
  • Video Display is Poor or Blank
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
      • With Third Row Video Screen
        • Notes
        • Without Third Row Video Screen
    • Repair Procedures
  • Video Entertainment System Inoperative
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Video Entertainment System Remote Control Inoperative
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Video Entertainment System Wireless Headphone Inoperative
    • Diagnostic Fault Information
    • Reference Information
      • Schematic Reference
      • Connector End View Reference
        • Notes
        • Scan Tool Reference
    • Circuit/System Testing
    • Repair Procedures
  • Voice Recognition Inoperative
• Repair Instructions
  • Mobile Telephone Microphone Replacement
  • Communication Interface Module Replacement (Cadillac)
  • Communication Interface Module Replacement (Except Cadillac)
  • Radio Replacement (Cadillac)
  • Radio Replacement (Except Cadillac)
  • Digital Radio Receiver Replacement
  • Amplifier Replacement (Cadillac)
  • Amplifier Replacement (Except Cadillac)
  • Antenna Replacement - Cellular Communications/Digital Radio
  • Fixed Antenna Replacement (Avalanche/Escalade EXT)
  • Radio Antenna Module Replacement (Utility)
  • Global Positioning System (GPS) Antenna Replacement
  • Digital Radio Antenna Cable Replacement
  • Antenna Cable Replacement (W/O Fixed Antenna)
  • Radio Antenna Cable Extension Cable Replacement (Avalanche/Escalade EXT)
  • Coaxial Cable Replacement - Navigation and Cellular Telephone Antenna
  • Audio System Transceiver Module Replacement
  • Video Display Replacement (Second Row)
  • Video Display Replacement (Third Row)
  • Rear Seat Audio Control Replacement
  • Audio/Video Disc Player Adapter Replacement (Except Cadillac)
  • Audio/Video Disc Player Adapter Replacement (Cadillac)
  • Speaker Grille Replacement - Front
  • Radio Front Speaker Replacement
  • Radio Front Side Door Speaker Replacement
  • Radio Front Floor Console Speaker Replacement
  • Speaker Replacement - Front Upper
  • Radio Rear Side Door Speaker Replacement
  • Speaker Replacement - Rear Pillar
• Description and Operation
  • Navigation System Description and Operation
    • Notes
    • Navigation System Components
    • Navigation Radio
    • Global Positioning System (GPS) Antenna
    • TV and VICS Antenna - Export, w/YQ6, YQ7
    • TV Antenna Module - Export, w/YQ6, YQ7
    • TV Antenna Amplifiers - Export, w/YQ6, YQ7
    • Auxiliary RCA Video Jacks
    • VICS Module - Export, w/YQ7
    • VICS Optical/Microwave Beacon Antenna - Export, w/YQ7
    • Voice Recognition
  • 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
  • Radio/Audio System Description and Operation
    • Contents
    • RPO Options
    • Circuit Operation
      • Radio Power
        • Notes
        • Radio Ground
      • Radio Speaker Outputs
      • Radio Head Unit Dimming
      • Amplifier Interface UQ3 (Non-GMLAN)
        • Notes
        • Amplifier Interface UQA (GMLAN)
        • Amplifier Radio Speaker Inputs
        • Amplifier Speaker Outputs
        • Remote Radio Audio Signal Inputs (UE1 only)
      • Cellular Telephone Mute (UE1 only)
    • Component Description
      • Antenna System
      • Radio
        • Notes
        • UVA Radio
      • Speakers
      • Auxiliary Jack Socket
      • OnStar®
        • Notes
        • Theft Deterrent
    • Customer Tips
      • Radio Reception FM
        • Notes
        • Radio Reception AM
      • Care of Compact Discs
        • Notes
        • Compact Discs Not Appropriate to Use
    • AM/FM Reception
      • Radio Signal
        • Notes
        • AM Reception
        • FM Reception
    • XM Reception
    • XM Satellite Radio
      • Notes
      • Digital Radio Receiver
      • Viewing Messages
        • Notes
        • Technical Information for the MP3/CD Radios (US8, US9 and UVA)
  • Video Entertainment System Description and Operation
    • Display Screen
    • AUX Inputs
    • Rear Seat Audio (RSA)
    • Wireless Headphones
    • Wired Headphone Jacks
• Special Tools and Equipment
  • Special Tools