Question about 2002 Chevrolet TrailBlazer

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2002 Trailblazer security light on, will not crank, replaced steering column

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  • 13 Answers

Follow exactly Key in off position starting out
1.Try to crank then leave in run (don't turn off) wait till security light stops flashing.
2. Turn switch off for 10seconds
3. Repeat 1 & 2 for a total of 3 times

It takes 10 mins before security stops flashing each time.

Posted on Jan 03, 2017

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  • Chevrolet Master
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Did you use the original key and lock cylinder? They are coded for the security system.

Posted on Dec 31, 2016

  • Bob Butcher
    Bob Butcher Dec 31, 2016

    No I lost original Lee's and Friends destroy life cylinder getting it out and have to casing on the other problem that led me to change out the column and I still have the same problem turn ignition on nothing no crank no nothing I get the 10-minute relearning nothing so that leads me to believe it's maybe not the security system it's something else

  • yadayada
    yadayada Dec 31, 2016

    You need to read the resistance value of the original key to get the right one or the system locks you out.

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1 Answer

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This seem to be a comand problem with GM.
Here's how to fix it.Put key in switch leave switched on 15 min. then switch off then crank the vehicle,you should be good to go. Let me know if it works.

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