How do I fix the trunk release button in a 92 Buick Le saber?

I don't want to spend a lot of money or have to take it in anywhere, but I would like it if the button worked.How do I fix the trunk release button in a 92 Buick Le saber?if its just the button go to the junk yard and get a button and pull the old one out and unplug it and plug the new one in