Diagnostic Aids
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
An open in the ignition switch B+ circuit or circuit fuse will cause the key in ignition warning chime to be inoperative.