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Changed battery in 99 chevy van now anti-theft won't let it start

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If it is the antitheft,then shut all doors,and the hood and set the alarm,then disarm it,this will allow vehicle to start.If it is the key fob,turn the key on for ten minutes,and then turn it off,and right back on,repeat this process three times,a total of 30 minutes to relearn the key fob.

Posted on May 10, 2010

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This may not work but worth a try. Pull the positive cable off the battery wait about 10 to 20 seconds and hope it will reset for you. Darrell S

Posted on May 10, 2010

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toomanyparts
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SOURCE: changed battery, car wont start,

alot of cars with anti theft can be reset by locking and unlocking the drivers door with the key give it a shot

Posted on Dec 08, 2010

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