How do you replace the ignition switch on a 1985 Chevy truck?

you pull the steering wheel off and underneath you will see a hole with a pin in it. turn your switch to the run position and push the pin up and it should come out

I have a 83 f-150 and replaced all the keys in it. There is a pin below the ign switch you knock out then pull out the key switch. let me know if it helped!