Car Problem Reports

Chevrolet Impala Engine Starts and Stalls Due to Secutiry System Fault

Chevrolet Impala Problem
42 Reports
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Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005

Engines Affected: 3.4L V6, 3.8L V6

Average Mileage: 99,351 mi (25,000 mi - 236,772 mi)


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.

  • Visitor, , 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.

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  • lil james, , 3.8L V6, 150,000 mi

    car wont start due to no fire to the crank sensor and fuel pump

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  • Visitor, , 3.8L V6, 98,000 mi

    My key comes out of the ignition in the on position. And stalls is that a faulty ignition cylinder?

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  • Visitor, , 3.4L V6, 131,321 mi

    its not fixed yet but this information is just what I needed. thanks repairpal

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  • Visitor, , 95,123 mi

    Security light on cant start car electronic systems in car will not work is there a recall and repair plan for this ?

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  • Visitor, , 3.4L V6, 88,352 mi

    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

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  • Visitor, , 3.4L V6, 109,000 mi

    Car wont start, secutiry light flashing.

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  • Visitor, , 3.4L V6, 38,425 mi

    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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  • Visitor, , 3.8L V6, 25,000 mi

    Not fixed....engine security light comes on, then car wont start and we wait 20 minutes until it starts again

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  • Visitor, , 3.4L V6, 80,000 mi

    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.

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