1997 GMC Suburban Brake light switch

Is there an easier way to get at the brake light switch? Can't see in there worth a darn. I believe it unplugs from the top. It will flip up but then I need to get it off the shaft. Which way do you slide it off the shaft and how do you get the retainer on the shaft off? Do you have to push a screwdriver in the plug to get it to release? Thank you. Will be waiting to receive you replay.