Engine Starts and Stalls Due to Secutiry System Fault on Chevrolet Impala

The engine may start and stall with the security light flashing. This is commonly caused by a failed passlock sensor which is part of the ignition lock cylinder. A secondary cause could be the ignition switch itself. Worn contacts inside the ignition switch can cause voltage drop issues which can affect the passlock system. Proper diagnoses should be performed before replacing any parts.

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Average mileage: 118,007 (9,700–236,772)
Engines affected: 3.4L V6, 3.8L V6
6 model years affected: 2000, 2001, 2002, 2003, more2004, 2005
76 people reported this problem
39 people shared problem details
2000 Chevrolet Impala- 3.8L V6
my Impala also has this problem, the "Security" light comes on, I cannot start it. I have to wait 10-15 min. then it will start....havent found a solution.
2004 Chevrolet Impala- 3.8L V69,700
My car has been doing this not starting up thing for aymt two years i think that we should start a partition cause why should we not have to pay out of pocket its not our mistake its chevy.lets get this thing started who with me?????
2003 Chevrolet Impala- 3.8L V6150,000
The vehicle will randomly shut off while driving or would not start at times without me having to either take key out and wait 5-10 minutes or disconnecting (-)battery cable for a few seconds to reset. The stalling of the engine while driving would occur every time the "SECURITY" light came on and made some clicking noise. I've read several posts in forums with people having the same problem with no solution from Chevy. I think it's unfair they have such a major issue but no recall, instead stick loyal customers with pricey repairs bills to "try" and find the problem.
2005 Chevrolet Impala- 3.4L V6109,000
Car wont start, secutiry light flashing.
Security light on cant start car electronic systems in car will not work is there a recall and repair plan for this ?
car wont start due to no fire to the crank sensor and fuel pump
2005 Chevrolet Impala- 3.8L V698,000
My key comes out of the ignition in the on position. And stalls is that a faulty ignition cylinder?
2005 Chevrolet Impala- 3.4L V6131,321
its not fixed yet but this information is just what I needed. thanks repairpal
2003 Chevrolet Impala- 3.4L V688,352
NOT STARTING and SECURITY LIGHT is problem--no problem with engine stalling every month or so--SECURITY LIGHT comes on and stayed on for few minutes 6 months ago, 3 months ago when key turned to start car--no sound--not start all electrical devices work wait---then start after 3 to 15 minutes--engine has NEVER stalled then last week, not start, rotate through messages 3 minutes, 15 minutes later--still not start half hour later, car started, but CHECK ENGINE LIGHT came on and stayed continuously each time engine was started Mechanic charged retail to replace ignition lock cylinder $ 225.90, almost that much to remove and replace, plus diagnostic fee, and recoding and reprogramming fee
2001 Chevrolet Impala- 3.8L V6140,000
I have had this same issue. No start with the security light. I found a guy who had a trick that has worked every time. First thing you do is turn the key into the on position, and wait 10 minutes. Then turn the key off and back to the on position 3 times in a row. Apply your foot to the brake and put your shifter all the way down and back up 2 times. Put your car back in park and the car will start up every time. My mechanic says its an ignition issue.
2004 Chevrolet Impala- 3.4L V698,000
the secutiry light comes on killing the engine, have to wait ten minutes for car to start
2003 Chevrolet Impala- 3.8L V6122,100
Engine starts and stalls ignition switch key is hard too turn when put in to start.
2004 Chevrolet Impala- 3.4L V680,000
at times it will not start I have to wait at least 10 minutes and then it will start. Its pretty good car except for the electrical issues its had. first it was the dimmer switch and now this.
2005 Chevrolet Impala- 3.8L V6158,100
Pass lock fail. Security message warning light. Engine will not start.
2002 Chevrolet Impala- 3.8L V6160,000
Security lite will flash, and the is no power to engine. All dash lights come on but wont start. It usally will turn over after 15 min or so but it happens continually. It needs to be a recall on the passlock
2004 Chevrolet Impala- 3.4L V6
I turn the key and everything comes on like the lights and everything but the car won't start the engine makes this silent sound when I try to start it. I did this for a while and it took about 30 minutes before it started up eventually it wouldn't at all
2005 Chevrolet Impala- 3.4L V6144,000
As soon as the security light is on n i put the car on park n turn off the engine it won't start at all it makes is a click sound before it would turn on after 10-20 min but now it don't even turn on at all
2004 Chevrolet Impala- 3.8L V6
Security light comes on,and my car won't start for 10-15min.had it fixed once at the dealership cost me $500 dollars. After about 2 yrs of it working OK it started it again. Why isn't it a recall on it.
2003 Chevrolet Impala- 3.4L V6211,000
Car will only start in the morning. After that security light is on and it won't start!
2005 Chevrolet Impala- 3.8L V610,210
2005 Chevy Monte Carlo security light is still on wont start
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