So I need to remove the instrument panel cover on the '88 K5 for some much needed dash light service. (About the only thing I can make out at night is the fuel gauge). Removed all the screws, and all was well and good until I got to the radio knobs. They need to be removed for the cover to come off, but how?? My shiny new 3000-page service manual of course only says "Remove radio control knobs", it doesn't explain how... Well-spent money indeed. This is the original factory radio; I was gonna swap it out anyway, but I'd like not to break it in the process if I can. I tried pushing and turning, pulling, just about everything I can think of, but I don't want to go at it with any more force until I know how they're supposed to come off. Counting on somebody here to have the knowledge!