What's the skinny on replacing the tumbler. After pulling the steering wheel, what am I looking at?

Pull the steering wheel, then the plate underneath it has to be compress while you get a locking ring off. You will need a special tool for this, but you can get one at napa/adv auto/etc for about $5-10. Then it is 3 screws to take off the turn signal switch, and 1-2 holding in the tumbler.

I had to do mine since the key wasnt anything but a nub, may have taken me 1.5 hours, including 2 runs to the store, 1 for the lock and 1 for the pushdown tool.