Here are two methods to reset the anti-theft system on 2007 Chevy Malibu:
1st method
1. Put the ignition in on position, let it breathe for 10 minutes, and remove it when the anti-theft system light stops blinking.
2. Crank up the engine; it should now start
2nd method
• While outside the car, press and hold the lock and unlock button together
• Let go when the car honks and the lights flash
• Put the key in the ignition and rotate to the ON position, and leave there for 30 seconds
• Switch on the car, and the anti-theft system would have reset
SOURCE: i can't disable my anti theft device on my chevy
This usually works.Lock the doors with the remote.Press lock twice sounding the alarm.Then press the unlock button twice.Your car should start now.If that doesnt work try this,Lock the car again with the remote once.Go over to the passenger side door and use the key to unlock the door then press in the door unlock all doors.Hopefully by now it worked.Now if none of these work your security probably malfunctioned and theres only two things that will work,One is disconnecting the battery for 5 mins then reconnecting.unlock doors.the start.If that doesnt work you'll have to take it to the dealer to get the security reset or replaced.The steps I have wrot you are the diagnostics to reset it.I hope these work for you and good luck.See ya had have a great day..
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SOURCE: how do i reset anti theft system 97 chevy
Leave the key on for 11 minutes until the security light stops blinking.
SOURCE: 2003 chevy malibu won't start and seems to be with the fuel pump
Try this I got it from the emission wiz
Put your key in turn it on dont start wait 10 mins remove key wait 10 seconds repeat this a total of 3 times. If that dont work try a different key do the same thing. This relearns your key to the ignition it started with Gm cars and trucks from 1999 to to 2006. It is a big problem but there is no recall that I know of. If that dont work a dealer needs to probably replace and reprogram your ignition switch and keys
SOURCE: 2005 Chevy Malibu Anti-theft system indicator light
I just had this to happen to me - here's what you do - when it will not crank - turn your key over to ACC and let it stay on here for 15 minutes, the THEFT SYSTEM light will stop flashing. Turn your key back to OFF then turn it over as normal when starting and it will start right back up! Found it out from an auto store! One lady paid over $700 and then found this out!!!
SOURCE: how do you reset the anti theft system
Try disconnecting your battery cables then wait about 10 minutes. The computer should reset itself. Reconnect the wires to the battery. It is normal for the theft light to blink about every 5 seconds when the ignition key is out or in the off position. This means the system is armed and working properly. Hope this helps. God bless!
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