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.
2003 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE
Cellular Communication DTCS
CELLULAR COMMUNICATION DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| DTC B2455 (Gen. 4) | Open In The Drain Wire Circuit Or A Short To Voltage In The Cellular Microphone Signal Circuit |
| DTC B2455 (Gen. 5) | Open In The Drain Wire Circuit Or A Short To Voltage In The Cellular Microphone Signal Circuit |
| DTC B2470 | VCIM Does Not Detect The Presence Of A Cellular Antenna |
| DTC B2476 (Gen. 4) | Button Depressed Too Long |
| DTC B2482 | A Button Is Pressed Or Stuck For More Than 15 Seconds |
| DTC B2483 or B2484 | VCIM Does Not Detect A Navigation Signal |
| DTC U1500 | VCIM Detects An Internal Communication Malfunction |
Factory Service Tools
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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.
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