Question about 1999 Pontiac Firebird

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Need to disarm antitheft alrm in my 99 fierbird

Starts for about two seconds then stalls

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  • yadayada
    yadayada May 11, 2010

    u have a pas key failure, the most common cause is the key or lock cylinder sensor.

  • Anonymous Mar 26, 2014

    How do I disarm the antitheft system I can't start my car the security light keep coming on

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You might have a problem with the antitheft system, I don't know what you've done or tested so far. But usually with the alarm enabled there wont be any start at all. It does sound like there is a problem with the ignition switch, but that's only if it starts and stalls after you let the ignition key go. The anti-theft alarm, is this a VTD, factory system, a factory alarm system, or an aftermarket alarm?

Posted on May 31, 2009

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It is telling me to lock the doors with the key, this will arm the system, then you should be able to unlock the doors after about 3 seconds and this should disarm the system. Also, if it doesn''t try unlocking the passenger side door or the back glass with the key. Let me know you must wait at least 3 seconds before unlocking back glass or passenger door to disarm system once one door is unlocked without setting off alarm it is disabled. hope this helps

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GM vehicles like your sunfire are notorious for failing antitheft systems called passlock. When this system fails, you get what you have. The engine will start for 5 seconds or less and then stall and shut down. There is a dead giveaway for this problem, after it stalls you'll see a light on the dash that says SECURITY or ANTITHEFT. If you see this light, that explains your problem. Here is a link that will help you.

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