all the fuses are good. There is a little hole in the cover under the switch. I can put a little screw driver in that hole and when I hit the right spot it will allow the switch to turn off.
Ignition switch will not turn completely off even when car is in park. on 2013 Chevrolet Malibu
Sounds like you may have a defective lock cylinder. There may be a PATS module or anti theft device on your vehicle and you may end up with programing issues when changing the cylinder. You may also want to contact a General Motors dealership. Your vehicle may still be under warranty or there may have been recalls on this particular problem. Good luck