Security light blinking

SOURCE: car wont start

YOU SHOULD REPLACE THE IGNITION .

SOURCE: Security light blinking

take it to a shop and have them diable the security system

SOURCE: 2000 Alero Security light flashing and wont start

With the new lock cylinder in it, turn the key on. The security light should blink. Leave the key on for 10 minutes, the security light will quit blinking and go out after 10 min. This will reprogram your security system and the car should start. Also leave a battery charger on it while the key is on, If the battery goes dead during the 10 minute reprogram sequence, you will have to start over again.

SOURCE: car won't start when security light is blinking

Vehicle anti-theft (VAT) system is not getting proper reading from the ignition switch. Your key has a resistor built into the head of the key (a silver bar on a black backing). Shine up this bar with some fine steel wool on both sides of the key. Possibly the wiring in the steering column that leads to the VAT module has gone bad or the connections in the ignition switch that mate up with the key's resistor no longer connect properly. End result: the starter and fuel injection system remain dead when all else seems normal............Security light on dash will stay on/flashing. There will be a 3 minute dead/reset period between each unsuccessful start attempt.

SOURCE: security light blinks on dash , truck wont even try to start

Does your key have a chip on it? If it does its probably the problem