How do you permanently remove the problem of having to reset the security system when it is causing the car to not start on a 2001 oldmobile alero?

Answer 1

This problem is almost always caused by a faulty Passlock sensor. Replace the ignition lock to fix the problem. It is easy to replace. It takes about 15 minutes, plus time to get the part and relearn the security code.

First start the engine and press the key straight inward. If the car stalls, you will need a new ignition switch as well as a cylinder.

First, obtain a new lock cylinder FROM A GM DEALERSHIP. Have them 'code' the cylinder for you so that your key will work with it. They will need your VIN. This number is visible near the bottom left corner of the windshield.

Stop the engine and turn the ignition to ON, but do not start the engine. Set the parking brake and shift into low gear. Remove the radio and instrument cluster, and pry out the small bezel around the lock cylinder. Unbolt the ignition switch from the car. Disconnect all wiring connectors from the ignition switch.

Turn the ignition to ON. There is a button on the side of

the ignition switch. Despress this button and use the key to pull the lock out. I recommend replacing the switch also, as it is likely damaged by the worn lock cylinder.

Install the new cylinder and reassemble everything.

Shift into Park and turn the key to off. Then put a charger on the battery.

Turn the key to Crank momentarily, then let it return to On/Run. Wait about 12 minutes. Turn the key to Off. Wait 15 seconds. Start the car. Remove the battery charger.

Use of a battery charger is critical to prevent accidentally learning an incorrect password into the BCM.