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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 501 (CELLULAR COMMUNICATION SYSTEM)
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Section 501 (Cellular Communication System)
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Section 501 (Cellular Communication System)
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Cellular Communication
- Diagnostic System Check - Cellular Communication
- Scan Tool Data List (Gen 5)
- Scan Tool Data List (Gen 6)
- Scan Tool Data Definitions (Gen 5)
- Scan Tool Data Definitions (Gen 6)
- Diagnostic Trouble Code (DTC) List
- DTC B2455: Cellular Phone Microphone Circuit Malfunction
- DTC B2470: Cellular Phone Antenna Circuit Malfunction
- DTC B2476: Cellular Phone Select Service Switch Malfunction (3 button assembly)
- DTC B2482: Cellular Phone Select Switch Range/Performance
- DTC B2483 or B2484: Global Positioning System (GPS) Sensor Circuit Low/Open
- DTC U1500: Inter-Device Dedicated Bus Malfunction
- OnStar Symptom Diagnosis
- Symptoms - Cellular Communication
- OnStar One or More Buttons Inoperative
- OnStar Call Center Remote Function Requests 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
- OnStar Reconfiguration
- Repair Instructions
- 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 (Generation 5)
- OnStar Sleep Cycle (Generation 6)
- 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 (Generation 6)
- Operation of the OnStar® Speech Recognition Systems
- 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.