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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 69 (COMPUTER RELEARN PROCEDURES)COMPUTER RELEARN PROCEDURES"Y" BODYPASSWORD LEARN PROCEDURE FOR ANTI-THEFT SYSTEM
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Password Learn Procedure For Anti-Theft System
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Password Learn Procedure For Anti-Theft System
WARNING: This page does not describe the selected car, but rather 38 other vehicles, including the 1998 Saturn SW2, 1998 Saturn SW1, 1998 Saturn SL2, 1998 Saturn SL1, and 1998 Saturn SL. However, it is still accessible from the selected car via links, so may be relevant.
- Password learn procedure must be performed if Powertrain Control Module (PCM) is replaced. A password is communicated between Body Control Module (BCM) and PCM to provide engine operation. If PCM is replaced, the PCM must learn the password from the BCM. If password learn procedure is not performed a Diagnostic Trouble Code (DTC) may be set in the PCM when attempting to start engine.NOTE: Ensure battery is fully charged before proceeding. Performing this procedure will cause a DTC P1630 to be set in the PCM. It will be necessary to use scan tool to check for DTC P1630 when performing this procedure.
- Turn ignition switch to ON position with engine off for 11 minutes. Turn ignition switch to OFF position for 30 seconds.
- Turn ignition switch to ON position with engine off for 11 minutes. Turn ignition switch to OFF position for 30 seconds.
- Turn ignition switch to ON position with engine off for 11 minutes or until DTC P1630 is set. Turn ignition switch to OFF position for 30 seconds.
- Turn ignition switch to ON position with engine off for 30 seconds.
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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.