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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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

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2003 alero security light flashing and won't start

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Feb 02, 2012 | 2003 Oldsmobile Alero

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2003 alero steering won't lock and nothing happens when you turn the key in the ignition

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.
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Well driving my 2003 oldsmobile alero a light came on the dash (security) what dose this mean

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

Sep 20, 2010 | 2003 Oldsmobile Alero

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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

Aug 30, 2010 | 2003 Oldsmobile Alero

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Im not sure if you got your alero to start yet. But heres an Idea, The alero comes with a security feature that if you have 3 failed starts it activates. a good sign of this is while having the key turned does your security light flash on the dash. if so turn the key forward with out starting the car and leave it on for 10 minutes and then the security light on the dash should stop flashing. Now turn the key off and remove key stick key backin and turn over to start car. Did your car start ??

May 10, 2010 | 2003 Oldsmobile Alero

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My 2001 oldsmobile alero will not start, I put gas and it would not crank over. Then the security light started flashing so I turned the key to the on poistion and was waiting 10 minutes and during that...

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.

Apr 24, 2010 | 2001 Oldsmobile Alero

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Try replacing the air filter.

Dec 21, 2009 | 2003 Oldsmobile Alero

1 Answer

2001 alero, anti theft, starts wont then quits, left key in on position for 10min, now no power, friend told me to disconnect the battery that will drop the ECM? again now it wont even boost. please help

Make sure your battery is fully charged and good. Then leave the key on 'till the security light stops flashing (sometimes more than ten min). If it refuses to start or will not stop flashing, your ignition tumbler chip may have failed (requires tumbler replacement and re-set security again) Can't guarantee it will fix your problem, cause I can't see what else is going on from here...but that's where I'd go first!

Aug 28, 2009 | 2003 Oldsmobile Alero

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When the vehicles security light is flashing and the car won't start..put the key in the ON position and wait until the security light stops flashing and then turn OFF and then start. this is from a security glitch and it shuts down the gas so car won't start. Good luck!!

Nov 05, 2008 | 2003 Oldsmobile Alero

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