Question about 1999 Pontiac Grand Prix

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Car wont start

Why would my security system in my 1999 pontiac grnprix not let it do any thang??? all the lites work it just wont start!

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  • yadayada
    yadayada May 11, 2010

    U will have to have the system tested by the dealer, they are the only ones that have the equip to diagnose these systems, I have heard the anti-theft module is an issue but can't confirm that at this point.

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Try this. Roll down the drivers side window. Close the door and turn the key to the On position. Don't try to crank the car right now. Leave the key on for ten minutes. After ten minutes turn the key off then try to start the car. This procedure tells the computer that it is not being stolen and it will reset the security system. This should hopefully let your car start. I hope this is helpful.

Posted on Jan 04, 2009

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These cars where notorious for a failed antitheft system called passlock. When this fails your car will start for 5 seconds or less, and then stall. You should also see a light on the dash somewhere that says "security"if this is the case. Look for this light, if you see it, go to this link for help and info. http://vatspasslockpasskeysecurityhelp.yolasite.com/

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Justchanged the steering column in my 1999


The passlock needs to be reprogrammed to the key.
PASSKEY LOCKOUT RESET ALL GM CARS 1999 AND UP
1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the PASSKEY system to recognize your key
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After the last time the vehicle should start.

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Security system wont let car start


It sounds like the security system has been activated so you need to roll down the drivers side window and close the door. Reach in and turn on the key to the Run position and leave in on for 10 minutes. After 10 minutes is up, turn off the key and then try to start the car. The car should start. If it doesn't start do the process over again. This usually fixes the problem. There is no way to turn off the security system unless you have a key fob. If you have the key fob, just unlock the car and that will disable the security system. I hope this has been helpful.

Jan 02, 2009 | 1999 Pontiac Grand Prix

1 Answer

Hey i have a 1999 grand prix the security system wont let me start the car. i was wondering how to un hook the security system so the car can be used agin?


There is no way to disconnect the security system on your car but there is a way to reset it. Roll down the drivers side window and close the door. (Stay out of the car, this is why you roll down the window) Reach in and turn the key to the On position. Don't try to start it. Leave the key on for ten minutes. After ten minutes, reach in and turn the key off. Then try to start the car. This usually will reset the security system. I hope this is helpful.

Jan 01, 2009 | 1999 Pontiac Grand Prix

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