Welcome to the site.

 

Welcome to the forum! Glad you got your key to turn

 

Same thing happens to mine sometimes. I have to sort of jiggle the key a little to get it to turn. Sort of figured the PO was one of those people that has everything but the kitchen sink on their key ring and it did it's toll on the cylinder. Hasn't happened as much recently as it did when I first got the car. **knocks on wood**

BTW. Welcome to the forum and just exactly what part of Southern IL are you from? Me, formerly Belleville.

 

JAFO, i live 35 miles south of Mt Vernon in the town of West Frankfort.

 

I have a 2002 chevy monte carlo I have change the ignition switch now security light flashes how do I disable security system

 

This thread is from 2010, I doubt they still have the same problem.
here is some useful information for your problem
https://montecarloforum.com/forum/si...ecurity-17611/

 

Just a thought, does the car start since you replaced the ignition switch? Not sure if you replaced the whole thing, but most people change the cylinder and leave the rest alone. Possibly the car needs to relearn the key? Wish you luck getting it sorted out.