How do you program a 2005 Malibu ignition switch with the anti theft system?

To program a 2005 Malibu ignition switch with the anti-theft system, you'll need to use a working key fob. Insert the key into the ignition and turn it to the "On" position without starting the engine. Wait for the security light to turn off, then turn the key back to "Off" and repeat this process two more times. On the third cycle, leave the key in the "On" position until the security light turns off again, which indicates successful programming.