how do i replace the ignition switch on my 1987 corvette?

If you haven't already bypassed the security system, the cars anti theft device, That's probably your problem. Me and my son just got a 86 and it's already tripped on us, from around 84 to 89 they all do it! If you look it up you'll see what I mean. The kits to do it are only like $60, and it's pretty easy to put in yourself. Good luck, hope I helped!