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Security warning light on???

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Old July 30th, 2006, 7:21 PM
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Default Security warning light on???

I have a 2002 Trailblazer LS, and it won't start today. The "service engine soon" light is on and the "security" light is blinking when I try to start it. What do I have to do to start this car?

Doug
Old July 30th, 2006, 10:39 PM
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Default RE: Security warning light on???

Sounds like the PassLock system is needing a re-boot. Security-system light is blinking, then
turn the ignition-key to the ON position. Wait ten to twenty minutes until the lights stops its
blinking or goes off, then turn off the key and re-start car. This should reset the PassLock.
Old July 31st, 2006, 11:40 AM
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Default RE: Security warning light on???

Thanks for the advice. I'll try it and let you know how it went.

Doug
Old August 4th, 2006, 3:16 PM
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Default RE: Security warning light on???

Here's an update...I had the car towed to the dealer. They're looking up some security codes for it. They don't know what to do yet. I'll let you guys know what I learn.
Old August 14th, 2007, 10:03 PM
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Default RE: Security warning light on???

What did you learn? I am having the same issue...
Old November 7th, 2007, 9:43 AM
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Default RE: Security warning light on???

There are alot of people with this issue and there are never any responses from people letting us know if they were able to get it fixed or not. Some people have bypassed the passlock issue to get around their problems but what about GM fixing the problem.ANYONE??????????
Old November 8th, 2007, 8:00 PM
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Default RE: Security warning light on???

Typically the passlock sensor has to be replaced. Its pretty common.
Old November 9th, 2007, 6:55 AM
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Default RE: Security warning light on???

Martinchev.
Thanks for your post. Do you work at a dealership? Appears you are pretty confident in the cause. If so hang around others on the forum will really appreciate it.
Is it an expensive part to replace? It seems that if it was this common there would be a recall on the affected vehicles.
Old November 9th, 2007, 11:21 AM
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Default RE: Security warning light on???

The passlock sensor is located inside the ignition switch. It is my understanding that this will need to be replaced as well as the tumbler assembly. Total cost to me the consumer..$444.83. This is supposed to be the updated version. I guess that means they know there is a problem.
Old February 5th, 2008, 10:54 AM
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Default RE: Security warning light on???

Well just when you think everything is going well...BOOM it all starts again. It has only been three months and today I get the call from the Mrs. very unhappy and stuck in a parking lot with the same problem. The dealership just replace the ignition switch last Nov. and now the problem is starting again.
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