Question about Chevrolet Monte Carlo

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Security light came on last night while i was driving now my monte carlo wont start all the lights come on it just wont start

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The SECURITY light is a common problem on GM cars. The key is not just a key, it also communicates with the ignition/lock cylinder, and then to the TDM (theft deterrent module) also known as the computer. When these parts dont communcate properly, the car thinks its being stolen and turns off the starter. The hard part is finding out which part is failing. Mechanics can use this to their advantage and change everything, running up a large bill. I have found that bypassing the system is the most cost effective method and you also never have to worry about the problem EVER again. Ive bypassed dozens of GM vehicles, and never had any issues after that. Here is a link that explains the problem and offers some solutions.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Monte Carlos effected by Vats or Passlock security Failure that can be fixed by bypassing
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2005 Good luck, hope this helps. Any questions, please comment back.

Posted on May 27, 2011

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Re: Reset monte carlo anti theift
The reset is correct , key in on position do not try to start if you do you have to start all over . Wait ten minutes , then turn key to off position then repeat 2 more times after third time turn key to off take key out then place key back in ignition then it should start if not there is something else wrong . Also hook a battery charger up to vehicle prior to starting this process so you won't run the battery down .270-556-7357 text with questions

Posted on Jun 26, 2015

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Posted on Jan 02, 2017

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95 monte carlo security light flashing and wont start. drove it one day and the next silence. wont turn over. battery is fine alternator is fine.


The security system (VATS/PassKey) is having problems, it's typical on those cars. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.

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The security system (VATS/PassKey) is having problems, it's typical on those cars. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.

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KEY WAS LEFT ON OVER NIGHT NOW EVEN AFTER CHARGING BATT. CAR WILL NOT START, KEY WON'T COME OUT OF IGN.OTHER VARIOUS PROBLEMS 06 MONTE CARLO SS


is your "SECURITY" light on the dash flashing when key is on start.
if it is leave the key on start for about 10 minutes and then try to start your car

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The security system (VATS/PassKey) is having problems, it's typical on those cars. You can find a great write-up here: http://newrockies.ca , it was the only thing that saved my Park Avenue.

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Most likely this is caused by either the dimmer being turned off (happens all the time on my Corvette) or the dimmer is defective.

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2002 Monte Carlo wont start


sounds like your passlock sensor on the ignition barrel is faulty. you will have to go to the dealer to have it replaced because of the programming after replacement.

Sep 11, 2008 | 2002 Chevrolet Monte Carlo

2 Answers

Car wont start. security light on.


I had this same problem with my 2002 Monte. It is a very cheap fix about $100(If you do not got to the dealer $800) The car thinks that you are trying to steal it so you have to turn the key in the on position until the security light goes off and when the light goes off dont try to start it. Turn the key to the off position and then try to start it. It should take about ten minutes. I know its frustrating cuz I've been there.

Aug 02, 2008 | 2007 Chevrolet Monte Carlo

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