How do you change out the light switch on a 1981 trans am?

this is tricky, and you need small hands...the knob that you pull the lights on with is held in with a spring loaded pin..it has to come out first. On a new switch, you will see the lock pin. it looks like a small rivet with a spring underneath it..so you reach up underneath the dash, push in the pin and pull the knob straight out all the way, this lets you undo the slotted nut behindshaft, that holds the switch in the dash, unclip the wire harness off the old switch, and it's out. Better disconnect battery ground first so headlights don't stay on until you are done.