Question about 2003 Buick LeSabre

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Anti theft security system

I have a 2003 Buick Lesabre...My problem is with the anti theft security system on my car....I left the lights on my car all night by accident...the next day it would not I removed the battery from my car to recharge it...That's where my problem began...I thought it was the battery but it wasn't...that battery is brand new! The car would not start would not recognize the key...I'd like to know how I can reprogram the car to get it to start again...I'd appreciate any help...Thank-you

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  • Anonymous Apr 03, 2009

    1995 Buick LeSabre. Security system problem. Dealer replaced a computer but did not solve. Nevertheless, have had little problem for several months. Have been able to start after waiting 3 minutes. Now, however, won't start at all. Security light comes on, sometimes flashes. Won't start with either key. I need a cheap solution, not another computer. Would like to disable the security system.



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Theft is flashing leave keyon untill the light stop flashing take about 20 minute after tur key of and try to start if flash again repeat hope it help fixya our post thanks pierre

Posted on Jul 13, 2008


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When security light comes on it will not start.

You have a coded key for your ignition. If you have another spare key-- try starting the car with that one and see if it works. You may need to disable the Anti Theft Security on your car. check out this video about deactivating Anti Theft Security System on your car.

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1 Answer

Why when I start my 1999 Buick lesabre it turns right back off?

Anti-theft system problem , is the security light lit on the dash ?

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The flashing light means the anti-theft system is not working correctly.
Possible causes include a bad chip in the key, the sensor in the lock cylinder, or the module that reads the chip.

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If you mean the anti-theft PASS system, it does not work that way.
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Otherwise a car thief could start the car.

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I have a 1998 Buick LeSabre that has been shutting off randomly going down the road for no apparent reason

It is common for GM's vehicles to stall due to the anti theft security system. Look for a light that says "security" the next time it stalls. If you see this light, check out this link for options and info.

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1 Answer

97 lasabre cranks good then dies like it's out of gas

This might be the anti theft security system. when this happens, look all around the dash for a light that says "security". One of the symptoms of a failed GM anti theft is....... Starts for 1-5 seconds and then stalls. If this is the case, check out this link for info on the problem and "do it yourself" solutions.

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1 Answer

Car wont start because security system is tripped

Leave key in ON position (do NOT start)
leave in ON position for EXACTLY 10 minutes, as SOON as the anti-theft light shuts off, then IMMEDIATELY start the car.

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1 Answer

Ignition switch of a 1994 LeSabre

Take out the fuse labeled AIRBAG/VATS (Vehicle Anti Theft System) and then put it back in.This will reset the security system allowing your vehicle to start.

Jun 23, 2009 | 1994 Buick LeSabre

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