assuming your switch is still good, you just have to take apart the top half of the column, its been a while since I took apart mine to fix the famous tilt steering wobble but I think your gonna need a lock plate removal tool to get to it, and you have to remove the blinker switch, I have to take mine apart again too, I can start my car without a key :shock:
wade
here you go this link helped me big time when I took apart mine.
http://www.superchevy.com/tech/sucp_0707_tilt_steering_column/index.html