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What does it mean when the security light comes on in a 2004 chevy impala

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Means that anti-theft system is enable, will cut off fuel pump and injector's, if the light is flashing, get in car turn key to on, wait about 10mim or so till light stops flashing, then turn key to off and back to start engine.

Posted on Jun 03, 2010

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How can i stop my security light from coming on when i start my 2004 3.4 liter chevy impala ?


Hi Glenn, did you by chance replace your PCM with a used computer? If so you will need to have it reflashed, If not sounds to me like the Passkey security needs to be relearned. Also wondering why you replaced PCM after replacing EGR valve, Please if you can give me some more info on your veh. Body control module controls security so something is not right. Please get back to me, Thanks Randy.

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2004 Chevy impala won't start sometimes


Is the "Security" light coming on?. If so, there is a problem with the Passlock key antitheft system. It is common for the ignition cylinder key detection contacts to go bad.

Replacing the key cylinder fixes the problem. The new cylinder has to be "relearned". See the internet and search for "2004 Chevrolet passlock system relearn procedure".

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Any light on on the dash? I think I might know the issue.. It has to do with the security failing. Common gm problem. its happened to m. check out this site.. this might be it! hope this helps

Aug 30, 2014 | 2004 Chevrolet Impala

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My 2004 Chevy Impala right head light won't come


There are right and left fuses for the headlights. The dimmer switch and headlight switch provide the ground circuit.
Do you have power at the fuse ?

Feb 15, 2013 | Cars & Trucks

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How do you reset security system on a 2004 chevy impala


the way i learned how to reset them is to turn on the ignition switch to the on position until all the lights come on but dont turn it to start leave for 15 minutes and when you come back turn key to off position and wait three seconds and then it should be reset. hope this helps.

Jan 31, 2013 | 2004 Chevrolet Impala

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My 2004 chevy impala security light came on in the message center, what can i do


GET IT CODE SCAN SEE WHAT CAUSING SECURITY LIGHT TO TURN ON. PROBLEM IN THE BCM MODULE OR THE IMMOBILIZER CONTROL MODULE CANT READ KEY CODE.

Aug 15, 2011 | 2003 Chevrolet Impala

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I have a 2004 Chevy Impala and the "service engine soon" indiactor light is on but no DTC codes are present. What does this mean???


THIS MEANS THAT THE VEHICLE REQUIRES AN OIL CHANGE NOT A CHECK ENGINE LIGHT. YOU ARE GETTING THE TWO MIXED UP

Jul 13, 2011 | 2004 Chevrolet Impala

1 Answer

2004 Impala, the "security" light


It means there is a security issue with the vehicle.Most likely your passlock sensor in your ignition switch is sending the bcm false voltage readings causing the light to come on.You may want to get this checked out because it could leave you stranded if the sensor gets worse.Another issue could be the bcm is getting wet from a water leak in the vehicle.

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How to reset check engine oil light 2004 chevy impala ls


that means tnat for some reason the engine needs more oil check the oil level and add as necesary then the light will automaticly go away

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1 Answer

Chevy Impala message center security


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.

Apr 08, 2010 | 2004 Chevrolet Impala

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