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 G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 363 (CELLULAR COMMUNICATION SYSTEM)
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Section 363 (Cellular Communication System)
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Section 363 (Cellular Communication System)
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. 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 (F1)
- Scan Tool Data Definitions (F1)
- Diagnostic Trouble Code (DTC) List (F1)
- DTC B2455: Cellular Microphone Signal
- DTC B2470: Vehicle Communication Interface Module Detects No Cellular Signal
- DTC B2476 (F1): Keypad Signal Circuit Voltage Less Than 2.8 Volts
- DTC B2482: Button Is Depressed Or Stuck For More Than 15 Seconds
- DTC B2483 or B2484: Vehicle Communication Interface Module Does Not Detect A Navigation Signal
- Symptoms - Cellular Communication (F1)
- OnStar One or More Buttons Inoperative (F1)
- Unable to Contact OnStar Call Center (F1)
- Microphone Inoperative - Caller Cannot Be Heard (F1)
- Voice Recognition Inoperative
- OnStar Button LED Inoperative (F1)
- No (or Noisy) OnStar Audio (F1)
- Repair Instructions
- 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.