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 MANUALSCHEVROLET2015EXPRESS 2500 BASE, VAN CARGO EXTENDED, 6.0L ENG VIN BREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSIMMOBILIZER SYSTEM
2015 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN B
Immobilizer System
2015 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN BSECTION Immobilizer System
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- DTC B0996: Vehicle Electronic Control Unit (ECU) VIN Check
- DTC B302A: Telematic Requested Immobilization
- DTC B3031: Security System Controller
- DTC B3055: No Transponder Modulation or No Transponder
- DTC B3060: Unprogrammed Transponder Identification Code
- DTC B3935: Transponder Authentication
- DTC B3976: Unconfigured Transponder/Vehicle Configuration
- DTC P0513: Theft Deterrent Key
- DTC P0633: Theft Deterrent Key Not Programmed
- DTC P1629: Theft Deterrent Fuel Enable Signal
- DTC P162B: Remote Vehicle Speed Limiting Signal Message Counter
- DTC P1630: Theft Deterrent Learn Mode
- DTC P1631: Theft Deterrent Fuel Enable Signal
- Symptoms - Immobilizer
- OnStar Stolen Vehicle Slowdown Active
- Repair Instructions
- Description and Operation
RENDER: 1.0x
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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.