99 suburban security wont reset?

Asked by Pasleyg Jan 13, 2017 at 01:34 PM about the 1999 Chevrolet Suburban C1500 LT RWD

Question type: Maintenance & Repair

Will start up then shuts off. Security light is on.
Tried the 3 10 minute reset and more. Wont reset.
Changed a worn ignition cylinder. Security still
wont reset, stays on constantly. Still just starts and
dies. Any suggestions??

3 Answers
188,365

Paul answered 7 years ago

it needs to be reset at the dealer...

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GuruB43Z6 answered 5 years ago

It's probably the security circuit board located under the dash near ashtray. Had the same problem so I pulled mine and found burnt spots on the board. It's a pain to get to.

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