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Security Light Flashing

Tiny
CABEISNER
  • MEMBER
  • 2001 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 315,000 MILES
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.
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Tuesday, July 12th, 2016 AT 2:03 PM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
No, try doing this to reset security system the auto makers keep changing them to try to stop theft. See picture.
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Tuesday, July 12th, 2016 AT 3:44 PM
Tiny
CABEISNER
  • MEMBER
  • 2 POSTS
I tried that. Twice. Did not help. Thanks though. Any other thoughts?
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Wednesday, July 13th, 2016 AT 6:10 AM
Tiny
HMAC300
  • MECHANIC
  • 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.
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Wednesday, July 13th, 2016 AT 6:44 AM

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