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 MANUALSCHEVROLET2003CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 6.0 UREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSTHEFT DETERRENT SYSTEM
2003 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 U
Theft Deterrent System
2003 Chevrolet Chevy Express G2500, Van Cargo Extended, 6.0 USECTION Theft Deterrent System
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Theft Deterrent
- Diagnostic System Check - Theft Deterrent
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B2947: Short To Ground On The Passlock™ Sensor Power Circuit
- DTC B2948: Sensed Battery Voltage
- DTC B2957: BCM Signal Input Voltage Low
- DTC B2958: BCM Signal Input Voltage High
- DTC B2960: Valid But Different Code Value Than Previously Learned Form The Passlock™ Sensor
- DTC B3031: BCM Is In Learn Mode But Does Not See A Valid Passlock™ Sensor Code
- DTC B3033: BCM Is Reading A Tamper Code From The Passlock™ Sensor
- DTC P1626: PCM Has Not Established Communications With BCM
- DTC P1631: PCM Did Not Receive A Valid Password
- Symptoms - Theft Deterrent
- Security Indicator Always On or Flashing
- Security Indicator Inoperative
- Repair Instructions
- Description and Operation
- Special Tools and 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.