Question about 2005 Chevrolet Blazer

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Anti theft light came on,stayed on for a few days then shut off,now the truck starts then stalls out after two seconds.Whats the problem??

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  • Chevrolet Master
  • 2,192 Answers

Sorry to hear about this problem. Unfortunately this is a classic GM antitheft system failure. Believe it or not, this is very common and can be very expensive to take to a mechanic. Do yourself a favor, go to this link and study up in this system. There is alot of information here and you should be able to learn what's going on. There are also some ways to fix this problem yourself at a much cheaper cost.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Feb 21, 2012

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Posted on Jan 02, 2017

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SOURCE: 2005 Chevy Malibu Anti-theft system indicator light

I just had this to happen to me - here's what you do - when it will not crank - turn your key over to ACC and let it stay on here for 15 minutes, the THEFT SYSTEM light will stop flashing. Turn your key back to OFF then turn it over as normal when starting and it will start right back up! Found it out from an auto store! One lady paid over $700 and then found this out!!!

Posted on Jun 08, 2009

  • 1 Answer

SOURCE: anti-theft system activated need info on to

all dash lights keep coming on and either stay on or flash until you step on brake....also the dinger keeps dinging until you press on the brake.....we have had a tech work on it but have no idea whats going on.....HELP

Posted on Feb 04, 2010

tayjoejoe
  • 2192 Answers

SOURCE: On 1996 Chevrolet Cavalier do they have safety

If its an antitheft problem, there will be a light that comes on the dash that says SECURITY, This light will come on right after it shuts off. If you see that light, this link will help you.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Aug 22, 2011

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2003 Saturn Vue with a identity anti theft system. Replaced my battery a few months ago. Couple weeks ago noticed a little difficulty starting up. Last week wouldn't start just clicking noise. Jumped...


Anti-theft system has nothing to do with it . Battery cables , maybe , Park neutral safety switch possibly ! With anti-theft system problem you wouldn't a click or anything , that is if the anti-theft disables fuel or the starter . Plus the SECURITY light would be on if it were a anti-theft system problem . Your best bet , take it to a qualified repair shop that knows how to do starter circuit testing >
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And what's this identity anti theft system ? No such thing ! The vehicle has a content theft an vehicle theft deterrent system !
This system disables fuel not cranking of the engine. The VCM/PCM will not disable the fuel due to any BCM message for the remainder of the ignition cycle.
If the VCM/PCM does not receive the same password from the BCM as the last learned one, the vehicle will start and then stalls due to the Fuel Lockout.

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Could possibly be the anti theft system. Check out this link. When the SECURITY fails, you should see a light on the dash that says security. A symptom of a failed anti theft is starting for 1-5 seconds and then stalling repeatedly. http://vatspasslockpasskeysecurityhelp.yolasite.com/

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the big brain

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1 Answer

05 mag started for 2 seconds then shut down `, now when i turn key does not even turn over . I replaced my battery. My factory keyless remote key will not lock or unlock doors either. whats the prob


This sounds like a bad key fob, when it starts and stalls after a few seconds means the anti theft system is on, the key may be bad, the computer may need to be scanned to get the codes, the codes will tell you if the key is bad, it sounds like you are locked out now after trying so many times it will lock you out, hope this helps, if you have a spare key try that one.

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Anti-theft system activated need info on to


all dash lights keep coming on and either stay on or flash until you step on brake....also the dinger keeps dinging until you press on the brake.....we have had a tech work on it but have no idea whats going on.....HELP

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