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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 883 (KEYLESS ENTRY SYSTEM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 883 (Keyless Entry System)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 883 (Keyless Entry System)
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedure
- Diagnostic Starting Point - Keyless Entry
- Diagnostic System Check - Remote Keyless Entry
- Scan Tool Output Control
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B3101: BCM Does Not Receive Acknowledgment Message From RCDLR
- DTC B3102: Keyless Entry Serial Data Circuit Is Shorted To Ground
- DTC B3103: BCM Detects A Short To Voltage In The Keyless Entry Serial Data Circuit
- DTC B3106: Body Control Module Detects An Invalid Message From The RCDLR
- Symptoms - Keyless Entry
- Keyless Entry System Inoperative
- Repair Instructions
- Description and Operation
- Special Tools & Equipment
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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.