After many hours of frustration, I found a link to a site with a solution, but the site wasn’t online anymore. So I found the content. Sorry for stealing this, if it’s yours and you want it removed, I happily will. Send me a note.
Have you ever needed to replace a headlight switch and can’t figure out how to remove it from the dash? This will work on most older GM cars and trucks with a pull out style switch. It’s real simple if you know the trick. There is a small push button on the back of the switch that allows the knob to be removed. Push the button and pull straight out on the knob. You can then access the nut that holds the switch into the dash. Look closely in the picture and you can see the button with the small spring around it.