1991 Buick Riviera Security Light Flashing engine won't cra

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Electrical problem
1991 Buick Riviera 6 cyl Front Wheel Drive Automatic 219000 miles

I took my car to a certified mechanic and after six weeks and several different tries he was unable to figure out why my security light is flashing and my car won't start. I am looking for things to check as the starter, a bypass switch, nor new ECU unit fixed the problem. The engine is good and it runs well other than this security system error. I need to know if the theft of the stereo system could be responsible for the car not starting because the proper grounds are not being maintained. Please help me fix my car so I can get back to work. Steafnie

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Thursday, June 25th, 2009 AT 2:36 PM

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