System "dings" as soon as key is off...with doors closed...why is this?

2002 CHEVROLET TRAILBLAZER
14,000 MILES
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W.D.OSBORN
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all doors are closed, all lights appear to be off, the security system doesn't "beep" the horn when activated. the dome lights shut-off quickly/abruptly when security is set...they used to dim , then shut-off. I suspect a switch is set wrong...I just can't find it. suggestions?
Jun 19, 2012 at 10:05 PM
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ASEMASTER6371
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i think you have an issue with the bcm. you need someone with a scanner that can read the bcm codes and view the data stream.

this is beyond doing at home unless you have a scan tool.

Roy
Jun 19, 2012 at 10:45 PM