There are I think four screws on the bottom of the steering column cover. Remove them, and the top cover should remove without much fuss. The turn signal switch is held on by one Phillips head screw, and of course its wiring harness. Remove & replace the switch, reassemble the column cover, done. It's very easy. Here is a very lousy photo that shows the stalk's wiring and its screw:
If I may ask, why are you replacing the turn signal stalk?
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