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: 113,837 (9,700–236,772)
Engines affected: 3.4L V6, 3.8L V6
6 model years affected: 2000, 2001, 2002, 2003, more2004, 2005
57 people reported this problem
30 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.
12 people like thisFlag inappropiate
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?????
9 people like thisFlag inappropiate
2005 Chevrolet Impala- 3.4L V6131,321
its not fixed yet but this information is just what I needed. thanks repairpal
7 people like thisFlag inappropiate
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.
6 people like thisFlag inappropiate
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
5 people like thisFlag inappropiate
car wont start due to no fire to the crank sensor and fuel pump
4 people like thisFlag inappropiate
2005 Chevrolet Impala- 3.4L V6109,000
Car wont start, secutiry light flashing.
3 people like thisFlag inappropiate
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?
2 people like thisFlag inappropiate
Security light on cant start car electronic systems in car will not work is there a recall and repair plan for this ?
2 people like thisFlag inappropiate
2004 Chevrolet Impala- 3.4L V698,000
the secutiry light comes on killing the engine, have to wait ten minutes for car to start
1 person likes thisFlag inappropiate
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.
1 person likes thisFlag inappropiate
2000 Chevrolet Impala- 3.8L V6158,000
The security light flashes, then it just dies, won't start untill fuse is reset, who wants to keep doing that. Pls help!!!
At first my Security light would come on and within about 3 days the car would not start. Would have to wait 15-20 minutes and it would start. This happened about 3-4 times the first year we had the car (bought used in 2013) Now the Security light comes on and anywhere from 3 days to a week later the car wont start... have to leave it sit over night and most of the next day before it will start. Cant plan on driving it any where for fear it wont start. Dont drive out of town might not get home. I drove it 3 blocks away from home today, shut it off, went back out to leave and the car wouldnt start so had to call my husband to come get my son and I. Tried talking to someone on the GM website and he couldn't give me an answer as to why there hasn't been a recall on the ignition switch. Lot of help he was. Will NEVER buy a Chevy again. Cant wait til this POC is paid off to get a car I can rely on. I checked the recall list to see if my car was on there and no it isn't. I am not going to pay for something that GM should be recalling. Am calling tomorrow to have a conversation with GM about this.
2005 Chevrolet Impala- 3.8L V6158,100
Pass lock fail. Security message warning light. Engine will not start.
2000 Chevrolet Impala- 3.4L V6150,000
same problem with the ignition switch. Car runs then stalls when turn flashers are on.
2001 Chevrolet Impala- 3.8L V6147,657
Try to start my car it won't turn over have to turn it to the on slot for ten minutes before it can start
2001 Chevrolet Impala- 3.4L V6230,564
Shuts off while driving. FIX- IGNITION MODULE & IGNITION SWITCH REPLACED
2004 Chevrolet Impala- 3.4L V6211,000
Car wont start sometimes.. sometimes i see the security light sometimes i wont.. replaced battery and starter
2005 Chevrolet Impala- 3.4L V6117,000
Engine light on and sometimes car won't idle for days have to ride accelerator and break to get going and it will stall out sometimes while on the highway.
2004 Chevrolet Impala- 3.4L V638,425
trip from nyc to montreal in July 2014. security light came on. parked in the garage for two days. ready to leave and the car will not start. call the gm canadian number and explained about the security light which may be the problem and asked if anyone can help.After about 30 mts speaking with two or three reps repeating the same info ,a woman came and said because i had no gm road asst, she would send a truck to jump start, but she could not find Sherbrooke st, only Sherbrooke Rue[smart canadians]. Waited for 30 mts and fortunately tried the spare key, engine started and was glad to see montreal in the rear view. Have a recall letter and the light is still on , so hopefully on Dec11, the problem will be solved
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