My wife and i were out one evening and stopped for a pop at a gas station. We came out, got in the car to leave and after putting the damn key in the ignition, it would not turn. So i ask my wife for her key thinking maybe mine was worn. Nothing!! Neither key would turn the ignition cylinder. So we had it towed to local Chevy dealer to find out the following day it'll cost $800.00 to repair. That's replacing ignition cylinder, replacing and reprogramming anti-theft switch.