92 GMC Ignition switch Replacement

Anyone done this? Both keys I have are having a real hard time now trying to turn. The second key is almost brand new copy. Seems the switch might be messing up. How hard is it to replace this item? Anyone have any steps to do this? If needed, you can email me at [email protected] I need to get this fixed before I get stranded out in the middle of who knows where.

thanks