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  • karjunkie 10/30/08 9:17 am PST

    Your first move should be to reset the security system on the car. You'll have to turn your key on without starting the car, and leave it on for about 10 mins then turn the key off and restart.However, Impala's are known for having bad passlock sensors in the ignition lock cylinder and that might be why your having the problem. If so, you will need to replace the sensor. Given so many complaints, I would think you may be able to convince the dealer to replace the sensor under an extended warranty. You can also complain to GM's service rep and see if he authorizes a free repair. Good luck!

  • MrShift@Edmunds 10/30/08 9:23 am PST

    I agree. The ignition lock isn't reading the key properly, or the key's built-in chip has gone rogue. (the latter less likely since this is on again/off again issue).

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