I replaced mine last year, ordered it from year one I believe with a matching trunk lock. They have new sets for yours. I believe https://www.yearone.com/Product/196...9-1970-1971-1972-buick-skylark-gs-parts/hp813 this is what I ordered. Their is a pin hole on inside of it some place that you press in and bezel key spot in front comes out. So then you can remove it. If I remember right I bought the new set 1st so I could figure it out.
Is your latch in the dash or door? Like George said, push a tumbler in pull the knob a bit. Repeat six times.
