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How do you reset the anti theft system on 2003 alero?


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2010-06-05 16:21:18
2010-06-05 16:21:18

Turn the ignition switch into the "On" position and leave for approximately 30 minutes. The security light will remain flashing for approx. 10-15 minutes. Then, will turn off and the modulator will reset. Then, turn the ignition to the off position take the keys out and the reinsert and start the car. The "security" light at this point will be off. Due to the security modular, the fuel pump is being shut off to control the theft of the car.

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Put the key in the ignition and turn it to the on position. Leave in this position for ten minutes. Turn key to off then to start. This should reset the security and the car should start right up.

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When playing with the electrical system to a car, it is important to have a diagram. A diagram for a 2003 Alero can be found in online forums and in maintenance books.

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Probably a problem with you key being worn and the theft lock system not recognizing it, so it thinks you are trying to steal you car because the key is not an exact match to what is programmed into the ignition switch, thus grinding but it will not start!

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It should reset by itself, unless there is a problem with the system. Have it checked or check the sensor.

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