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 G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSTHEFT DETERRENT SYSTEMDIAGNOSTIC TESTSDTC B3031: CONTROLLER IN LEARN MODECONDITIONS FOR SETTING DTC
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Conditions For Setting DTC
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Conditions For Setting DTC
- A new Passlock(tm) module has been installed and ignition is turned to RUN position but not rotated to CRANK position. Once ignition switch has been rotated to CRANK position, Passlock(tm) module will learn Passlock(tm) code. Theft relearn procedure will need to be run in order to make Powertrain/Vehicle Control Module (PCM/VCM) receive the correct fuel enable password.
- Passlock(tm) module is in learn mode but does not see a valid Passlock(tm) sensor code because of a sensor or a wiring problem.
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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.