Question about 2000 Oldsmobile Alero

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2000 Alero Security light flashing and wont start

I replaced the lock cylinder and the security light keeps blinking and the car wont start, so i put the old lock cylinder back in and it still wont start

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  • David Painter
    David Painter Feb 01, 2013

    tried that,starter will not ingadge,reset security

  • Anonymous Mar 21, 2014

    security light flashing

  • Anonymous Mar 21, 2014

    door locks by its self and car wont start

  • Anonymous Mar 30, 2014

    i unplug the loom on the computer and to it back but the car is not starting since

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  • Master
  • 4,669 Answers

With the new lock cylinder in it, turn the key on. The security light should blink. Leave the key on for 10 minutes, the security light will quit blinking and go out after 10 min. This will reprogram your security system and the car should start. Also leave a battery charger on it while the key is on, If the battery goes dead during the 10 minute reprogram sequence, you will have to start over again.

Posted on Mar 08, 2009

  • Clint Smock
    Clint Smock Mar 08, 2009

    Did it work?

  • LYDIA VILLASENOR May 27, 2013

    WRONG CAR ITS A 2008 TOYOTA COROLLA

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  • Oldsmobile Master
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2 Answers

How to reset anti-theft on a 2000 alero


The security, antitheft or lock picture/icon 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). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
http://www.diy-gm-security.com/

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Apr 04, 2015 | 2000 Oldsmobile Alero

1 Answer

Replaced ignition car wont start


Here is a link that can help you with the bypassing of your Passlock antitheft system. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Mar 25, 2012 | 2000 Oldsmobile Alero

1 Answer

REPLACED KEY CYLINDER AND HOUSING. DID RELEARN STEPS AND CAR STILL WONT START. SECURITY LIGHT SOLID DOSENT BLINK. WHEN CAR IN RUN POSTITION NO SECURITY LIGHT ON. CAR STARTS BUT FUEL SHUTS OFF IN SECONDS. I...


Rule of thumb, when the security light flashes, thee problem will be in the key or ignition. When its solid, its probably the theft deterrent module. TDM. This link might help you understand the problem. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Sep 02, 2011 | 2000 Saturn SL

1 Answer

When I try to start car, it won't start and security light blinks. I'v e had to ignition switches put on before and I had a new key made. Car still won,t start.


If any of the gauges are blinking and going haywire and the security light flashing then the instument cluster is faulty.But if it is just the security light flashing then its in the switch.If you only had the switch replaced then you need a new ignition lock cylinder because its worn out.

May 11, 2011 | 1995 Oldsmobile Cutlass Supreme

1 Answer

I 'v been this roblems over 3 years and spent so much money to fix it. My 1999 Oldsmobile Alero wont start with security theft light flashing. I have to wait for 10 minutes and then if i lucky it may...


SOUND LIKE THE THEFT SECURITY PROBLEMS. MOST OF THE TIME.THE IGNITION KEYS OR IGNITION SWITCH KEY LOCK CYLINDER WORN WHERE THE BCM AND PCM DONT RECOGNIZE KEY OR SWITCH SIGNAL.SO THE BCM AND PCM WILL GO IN THEFT SECURITY MODE.THE DEALERSHIP WILL HAVE TO FIX.BECAUSE IF THE KEYS , IGNITION SWITCH AND LOCK CYLINDER AND BCM HAS TO REPLACED.THEY WILL HAVE TO BE REPROGRAM USING DIAGNOSTIC EQUIPMENT. NOT A HOME FIX.YOU WILL NEED TO GET FIX SOON AS POSSIBLE.BECAUSE FAULTY SECURITY THEFT CODE WILL SHUT DOWN VECHICLE FUEL SYSTEM WHILE DRIVING OR IT WILL GET TO A POINT WHERE CAR WONT START NO MORE.THIS FIX WILL COST ABOUT $600.00.

Dec 23, 2010 | 1999 Oldsmobile Alero

2 Answers

I just replaced the starter in my 2000 olds alero and now it wont start it keep flashing securty....it thinks it is benig stolen....how can I fix this


Most likely you replaced the starter because it wouldn't crank over. If this is correct and the security light was flashing before replacing the starter, then most likely you have a problem with the pass-lock system. If your ignition cylinder is located in the dashboard, you will need to remove it and replace the passlock housing.

Sep 27, 2010 | 2000 Oldsmobile Alero

1 Answer

My 2001 alero dont start. the security light came on. I will like to know if the security light is what is not letting the car start


if your security light flashing it will not start. you let it flash for 10 to 15 min then it should stop. turn the key off then try to start the car. if it does start you need a ignition lock cylinder

Jan 24, 2010 | 2001 Oldsmobile Alero

3 Answers

2000 ALERO SECURITY LIGHT


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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