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Originally Posted by Mickey#1
Sounds like they might mean the lock cylinder.
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Possibly but I doubt the key lock cylinder is the cause of whatever problem the OP has based on typical symptoms of a bad ignition switch. Speaking of which the OP should post what symptoms he/she is having and see if anyone concurs. Basically, if the key cylinder/tumbler works when key is inserted and turned on/off, the Passkey VATS is good and the chime is heard when key is inserted then the key lock cylinder is most likely good. The contacts that needs to be cleaned due to carboning up and/or arcing over the years is in the black module seen in the pic which has the multiple electrical contacts, cams and springs. Common problem with '97 and up Regals when experiencing multiple electrical problems like DRL, cruise control, headlamps flashing, no defogger, no foglights or the classic HVAC blower motor BMR (blower motor resistor) did not fix it problem. A few of us on the Regal forum have done it and there are a few good old posts concerning detailed removal and cleaning. The key cylinder and ignition switch/harness are two separate parts.