I have a 2010 Impala LT, domestic model, that was stolen using a misplaced key. Since the thief had a properly programmed key, I would like to reset the Passkey system to ensure that they can't use any copies that might have been made (the stolen key wasn't cut exactly right, and wouldn't turn the door lock, but would turn the ignition, so I'm not worried about the door lock). I plan on getting an aftermarket key made at a hardware store or locksmith anyway, so I will have an unprogrammed key. Is there a method on this car to reset the passkey system without taking it to the dealer? Thanks for your help.