Car worked fine, then got in to leave and it wouldn't start, not even turn over. The security light is on and flashing. We took the battery off for 20 min and put the key in and ignition on for 15 min. Nothing! We checked all fuses and replaced some and nothing still. We checked the chip in the key and it's still good.
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Re: security light on and car not starting
Put the key in ignition and leave in the on position for 20 minutes and it should start after that. I had the same problem with a 99 chev silverado an it worked for that. Hope it get you going. Thanks.Bear001
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sound like theft security problem.when you try ten minutes did you leave ignition switch on position for ten minutes until the security light turn off then turn off ignition switch for 5 seconds then try starting vechicle.when you do 10 minute trick security light has to turn off or disappear when you see security light go off turn off switch 5 seconds then try starting vechicle.
to reset security you'll ned to do the 10min key with ign. on for 3times after each 10 min turn key off briefly then back on without trying to restart after 30min or three 10min ign on cycles turn off key briefly then the car should start
These cars and many many many other gm cars and trucks are equipped which an antitheft feature. Many times on engines swaps and ignition changes, this system gets interrupted because the computer is not seeing the proper signal from the original equipment. Try to start the car, when it doesn't turn over, leave the key in the "on" position. Look for a light near your gauges that says "security" or "antitheft". If you see this indicator light, then the problem is definitely the antitheft system. Fixing it is rather expensive. Bypassing it is relatively cheap. This link explains everything you need to know.
Hello: TRY THIS Attempt to start the car leave the key on for 10 minutes or until the security light goes out, at this time turn key off for 10 seconds, turn switch on for ten more minutes or when security light goes out, turn key off for 10 seconds. Turn key ON for ten minutes or when security light goes out, turn key off wait 10 seconds, then start car....
is the security light flashing or on,,u mite have to turn ignition on (but not all the way to start) leave on for 15 minuets,,then turn off,,then try to start,,if the security system is on,,,,it will not start,, hoped it helped,,
check and make sure your security light isn't on. The security feature malfunctions on these models often. If the security light is on, turn everything in the car off (radio, a.c. etc.) turn the key off, turn it back on to acc tap it into start until if just starts to turn over then leave it in the relaxed start position. Allow the car to just sit like this for up to 20 minutes. The security light will go off and you will then be able to turn the key off and then start the vehicle.