2005 CTS V
Previous owner broke off the black tabs that flank both sides of the key on the ignition cylinder. I have never seen these broken on a car before. I am assuming that I have to replace the ignition cylinder and have the dealer code the new key to fix. The cylinder for the manual cars is discontinued. What is the purpose of the button that lets you turn the key to the lock position? Can I put in a new cylinder for an automatic?