Diagnostic Aids
WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
If there is a short or open in circuit No. 1073 (White/Black wire) or No. 1074 (Purple/White wire), BCM will be unable to accept a valid PASS-Key(R) II code when program mode is activated. If DTC B2957 or B2958 is set, BCM's ability to properly read PASS-Key(R) II resistance value will be affected. Ensure key resistor contacts are clean and free of any grease or oil.