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 MANUALSCHEVROLET2002AVALANCHE 2500, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1407 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)
2002 Chevrolet Avalanche 2500, RWD
Section 1407 (Cellular System, Entertainment System, And Navigation System)
2002 Chevrolet Avalanche 2500, RWDSECTION Section 1407 (Cellular System, Entertainment System, And Navigation System)
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Entertainment/Communication Component Views
- Entertainment/Communication Connector End Views
- Amplifier C1 (WBM)
- Amplifier C2 (WBM)
- Amplifier C3 (WBM)
- Cellular Telephone Microphone (UE1)
- Digital Radio Receiver (U2K)
- Radio C1
- Radio C2
- Radio C3 (U32)
- Speaker - LF
- Speaker - LR
- Speaker - RF
- Speaker - RR
- Speaker - LF (Tweeter) (UW6/WBM)
- Speaker - RF (Tweeter) (UW6/WBM)
- Speaker - Subwoofer (WBM)
- Vehicle Communication Interface Module (VCIM) C1 (UE1)
- Vehicle Communication Interface Module (VCIM) C2 (UE1)
- Video Display (U32)
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- DTC B1025, B1035, B1045, or B1055
- DTC B1259
- DTC B1287
- Diagnostic Instructions
- 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 Verification
- Circuit/System Testing
- Repair Procedures
- DTC B2455
- DTC B2470
- DTC B2476
- DTC B2482
- DTC B2483 or B2484
- DTC U1500
- Symptoms - Cellular Communication
- Audio System Troubleshooting Hints
- Video Entertainment System Troubleshooting Hints
- Audio Distortion - One or More Speakers
- Auxiliary Video Display is Poor or Blank
- Digital Radio Poor or No Reception
- Digital Radio Receiver Setup
- Global Positioning System (GPS) Data Not Current or Inaccurate
- Microphone Inoperative - Caller Cannot Be Heard
- No (or Noisy) OnStar Audio
- OnStar Button LED Inoperative
- OnStar Call Center Remote Function Requests Inoperative
- OnStar One or More Buttons Inoperative
- OnStar Reconfiguration
- OnStar Symptom Diagnosis
- Radio Poor Reception
- Radio Setup
- Reduced Volume - One or More Speakers
- Speaker Replacement Reference
- Speakers Inoperative - All
- Speakers Inoperative - One or More
- Speakers Inoperative - Subwoofer
- Unable to Contact OnStar Call Center
- Video Display is Poor or Blank
- Video Entertainment System Inoperative
- Video Entertainment System Remote Control Inoperative
- Video Entertainment System Wireless Headphone Inoperative
- Voice Recognition Inoperative
- Repair Instructions
- Mobile Telephone Microphone Replacement
- Communication Interface Module Replacement
- Compact Disc Care and Cleaning
- Radio Replacement
- Digital Radio Receiver Replacement
- Amplifier Replacement
- Mobile Telephone Digital Antenna Replacement
- Cellular Communications/Digital Radio Antenna Replacement
- Fixed Antenna Mast Replacement
- Fixed Antenna Replacement
- Digital Radio Antenna Cable Replacement
- Antenna Cable Replacement
- VES Overhead Console Replacement
- Radio Front Side Door Upper Speaker Replacement
- Radio Front Side Door Speaker Replacement
- Radio Rear Speaker Replacement
- Radio Rear Side Door Speaker Replacement
- 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
- Radio/Audio System Description and Operation
- Video Entertainment System Description and Operation
- OnStar 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.