Question about 2003 Oldsmobile Alero

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Car won't start

The security light in my 2003 alero was flashing. I shut the car off and it would not start again my battery was good. would the security system get the vehicle from starting

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  • teddybare55 Feb 20, 2009

    Do you leave the charger on through the whole process

  • Anonymous Apr 24, 2009

    Car would not start, would not turn over, security light flashing.

    Cleaned battery terminals, no change.

    Turned car to on position for 1/2 hour, turned off, then it worked- car started. Works fine now, but I consider it totally unreliable. I don't want to fork out $600 or what ever it costs to fix a 7 year old car.

    Solution: trading this piece of junk in for a new Dodge Charger.

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Yes, the security system will cut fuel to the cylinders or stop the car from cranking. what you can do is called a 30 minute re-learn. have everything turned off and a charger hooked up to the battery if possible, put the key in and attempt to start, release key to the run position and let it sit for about 10 minutes or untill the security light goes out. turn key off for 5 seconds and repeat the process 2 more times. after the process is done 2 more times the car should have re-learned the key and it should start. if it still doesn't start the problem might be somewhere else in the security system but try the 30 minute re-learn first. i can assist you with this problem further if needed as i have excellent resources.

hope it starts for ya!

Posted on Feb 20, 2009

  • Nicholas Csorba Jr. Feb 20, 2009

    yes because when you leave the key on the run position all the cars modules are "awake" and it can cause the battery to drain rather quickly. it also helps if you can turn your headlights off, i know some models have an auto-headlight feature but you can turn them off to save power

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1 Answer

Engine won't start


If the security light is flashing just leave the key forward for exactly 10 minutes when it stops flashing give it a try it will work

Feb 02, 2013 | 2001 Oldsmobile Alero

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The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. (Theft Deterrent Module) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return and can be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

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1 Answer

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If the security light keeps flashing,you might as well do a reset.
Be sure to turn off all the accesories including the radio before you start the process.
Insert the key to the ignition switch and turn the key to ON position without starting the car.
leave it ON until the flashing light (security) stops.It will take approximately 15 to 20 minutes.
As soon the flashing stop,turn the key to OFF
position and start the cart.
Hope this help.

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1 Answer

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Will the vehicle restart if it is shut off? The security flashing light usually indicates a passlock issue with the key or the passlock.

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1 Answer

I am having the same issue with my anti-theft device in my 2003 Alero. Last year it stopped running and would not turn-over. $400 later, Brakemax said they just had to reset the anti-theft device. oK,...


the shop that told you they ripped it out only ripped you off unless they removed some aftermarket alarm system i,m a gm mechanic and if you remove the factory anti-theft on a 2003 olds alero it will not run ever again until re-installed make sure your battery is charged good turn igntion switch to run position but do not try to start security light should be flashing let car sit with switch on and light flashing for ten minutes light should stop flashing now start your car this is how to reset anti-theft was that worth $400.00 and again why let a bussiness named brakemax look at a no start condition keep on and you will be BROKE to the max HOPE THIS HELPS AND STAY AWAY FROM THEM YOUR FRIEND @ HELPMAX

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im just gonna take a stab in the dark here i understand that your security light is on try unlocking your door with your key sometimes you just need to reset the security. otherwise ive seen a security module go bad that may be preventing you from starting it.

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1 Answer

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1 Answer

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