Security Light Flashing

2001 CHEVROLET SUBURBAN
315,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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CABEISNER
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My security light is flashing. When I try to start there is nothing (like a dead battery, but battery is fully charged and everything works). I do not believe it is the pass-lock as the truck does not engage the starter. I have tried two different keys, blowing out the ignition switch with compressed air, disconnecting the battery for a day, etc. My only thought is the ignition switch went bad. Am I correct? Does that just "happen" as this is the only time I have ever had an issue like this. Any help would be greatly appreciated.
Jul 12, 2016 at 2:03 PM
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HMAC300
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no, try doing this to reset security system the auto makers keep changing them to try to stop theft. see picture.
Jul 12, 2016 at 3:44 PM
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CABEISNER
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I tried that. Twice. Did not help. Thanks though. Any other thoughts?
Jul 13, 2016 at 6:10 AM
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HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
yes, you will have to have a mechanic scan for codes to see what is wrong with security system that is why it wont start. Check fuses under hood as well as there may be one blown.
Jul 13, 2016 at 6:44 AM