Buick Regal: Immobilizer

 DTC B125C

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Refer to Diagnostic Procedure Instructions for an overview of each diagnostic category. DTC Descripto

 Instrument Panel Compartment Door Lock Cylinder Coding

The internal lock cylinder only uses 4 of the 8 cut positions, 5 - 8. The tumbler positions are on both sides, are not self-retaining, and are not snap in. 1. NOTE: All lock cylinders for side milled keys have right and left tumblers. The location of the tooth of the tumbler determines whether i