Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 399 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Section 399 (Cellular System, Entertainment System, And Navigation System)
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Section 399 (Cellular System, Entertainment System, And Navigation System)
WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Diagnostic Starting Point - Cellular, Entertainment, and Navigation
- DTC B0000
- DTC B1024
- DTC B1259
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Diagnostic Aids
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Actions Taken When the DTC Sets
- Conditions for Clearing the DTC
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Procedures
- DTC B1283-B1286
- DTC B2455
- DTC B2462 (Navigation Radio)
- Diagnostic Instructions (Navigation Radio)
- DTC Descriptors (Navigation Radio)
- Circuit Description (Navigation Radio)
- Conditions for Running the DTC (Navigation Radio)
- Conditions for Setting the DTC (Navigation Radio)
- Actions Taken When the DTC Sets (Navigation Radio)
- Conditions for Clearing the DTC (Navigation Radio)
- Reference Information (Navigation Radio)
- Circuit/System Testing (Navigation Radio)
- Repair Procedures (Navigation Radio)
- DTC B2462 (Communication Interface Module)
- Diagnostic Instructions (Communication Interface Module)
- DTC Descriptors (Communication Interface Module)
- Circuit/System Description (Communication Interface Module)
- Conditions for Running the DTC (Communication Interface Module)
- Conditions for Setting the DTC (Communication Interface Module)
- Action Taken When the DTC Sets (Communication Interface Module)
- Conditions for Clearing the DTC (Communication Interface Module)
- Reference Information (Communication Interface Module)
- Circuit/System Testing (Communication Interface Module)
- Repair Procedures (Communication Interface Module)
- DTC B2470
- DTC B2474
- DTC B2476 or B2482
- DTC B2485
- Symptoms - Cellular Communication
- Symptoms - Entertainment
- Symptoms - Navigation Systems
- Audio/Video Disc Player Adapter - Audio or Video Inoperative or Degraded Quality
- Bluetooth Malfunction
- Digital Radio Malfunction
- OnStar Global Positioning System (GPS) Data Not Current or Inaccurate
- OnStar Microphone Inoperative - Caller Cannot Be Heard
- Navigation System - Poor or Inoperative TV Reception
- Navigation System - Voice Recognition Inoperative
- No (or Noisy) OnStar Audio
- No Global Positioning System (GPS) Reception
- Noise Compensated Volume Inoperative
- OnStar Button LED Inoperative
- OnStar Call Center Remote Function Requests Inoperative
- OnStar One or More Buttons Inoperative
- Radio Poor Reception
- Speaker Replacement Reference
- Speaker Malfunction
- Unable to Contact OnStar Call Center
- OnStar Voice Recognition Inoperative
- Repair Instructions
- Communication Interface Module Replacement
- Wireless Communication Interface Antenna Replacement
- Compact Disc Care and Cleaning
- Radio Replacement
- Digital Radio Receiver Replacement
- Radio Volume Compensator Interior Noise Microphone Replacement
- Radio Speaker Amplifier Replacement
- Mobile Telephone Digital Antenna Replacement
- Cellular Communications/Digital Radio Antenna Replacement
- Television Antenna Amplifier Replacement
- Radio Antenna Module Replacement
- Television Antenna Module Replacement
- Electronic Navigation Antenna Replacement
- Navigation Antenna Coaxial Cable Replacement
- Video Display Replacement
- Auxiliary Audio/Video Input Control Replacement
- Radio Rear Speaker Grille Bezel Replacement
- Driver or Passenger Seat Head Restraint Speaker Replacement
- Front Upper Speaker Replacement
- Radio Front Side Door Lower Speaker Replacement
- Radio Front Floor Console Speaker Replacement
- Radio Rear Speaker Replacement (Center)
- Radio Rear Speaker Replacement (Left)
- Radio Rear Speaker Replacement (Right)
- Radio Rear Side Door Speaker Replacement
- Description and Operation
- Navigation System Description and Operation
- Notes
- Audio System Description
- Navigation System Components
- Navigation System Components - YQ6 or YQ7
- Navigation Radio
- Global Positioning System (GPS) Antenna
- Route Guidance
- Auxiliary RCA Video Jacks (If Equipped)
- Voice Recognition
- Points of Interest
- Bluetooth (If Equipped)
- Speed Alert
- Speed Advisory
- TV and VICS Antenna (If Equipped)
- TV Antenna Module (If Equipped)
- TV Antenna Amplifiers (If Equipped)
- VICS Optical/Microwave Beacon Antenna (If Equipped)
- OnStar Description and Operation
- Notes
- Communication Interface Module (CIM)
- OnStar® Button Assembly
- OnStar® Microphone
- Cellular and GPS Antennas
- Bluetooth ® (If Equipped)
- Bluetooth ® Features Supported
- Pairing a Bluetooth ® Cellular Phone to the vehicle
- Back-up Battery (BUB) (If Equipped)
- Audio System Interface
- OnStar® Steering Wheel Controls
- OnStar® Sleep Cycle
- Features
- Deactivated OnStar® Accounts
- OnStar® Cellular, GPS, and Diagnostic Limitations
- Mobile Identification Number and Mobile Directory Number
- Operation of the OnStar® Speech Recognition Systems
- Radio/Audio System Description and Operation
- Notes
- Radio Circuit Operation
- Antenna System
- AM/FM Reception
- Digital Radio Receiver (if equipped)
- Speaker Operation
- Audio Amplifier (If equipped)
- Radio Data System (RDS) (If equipped)
- RDS Messages
- MP3/CD Formatting Information for MP3/CD Radios
- Integral Multi Disc CD/DVD Changer (IMDX) (If equipped)
- Theft Deterrent
- Radio Personalization w/Home and Away Feature
- Radio Error Messages
- OnStar ® (if equipped)
- Steering Wheel Controls (if equipped)
- Using the Auxiliary Input Jacks (if equipped)
- Noise Compensation (If equipped)
- Speed Compensated Volume (If equipped)
- Navigation System Description and Operation
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.