How do you change the wiper blades on a 1994 Chevy Corsica?

I%26#039;m sure this is a very easy process but I can%26#039;t seem to figure out how to remove the old ones to be able to put on the new ones.|||lift the wiper arm up. where the blade is attached to the arm will be a black plastic fitting. there will be a button on the bottom of the fitting. push that button and it will release the blade from the arm. if you cant get it, go to a parts store and they will replace them for you, and pay attention to what they are doing so next time you can do it all by yourself|||i drive to the parts store and say..%26quot; please install new blades for me%26quot; i pay they install