I did a post about that back in February. Here it is:
Here's how to remove the glove box lock cylinder. First is the explanation, then some pics:
1) Put the latch catcher in the "up" or closed position, and with the key, lock it, like in the first photo.
2) Remove the key
3) Using a tiny screwdriver, push down on the steel tumbler that is visible thru the little window in the top of the lock housing. It's that shiny spot in the photos. The tumbler is spring loaded. Hold it down while pulling on the chrome lock bezel as best you can. You can also shove a 2nd tiny screwdriver in the slot under the latch catcher to push the cylinder outward, while holding down the steel tumbler. That may be easier than trying to pull on the chrome lock bezel. Once it pushes out some, you can grab the chrome bezel easier. The tumbler will move out a little when you get past the steel tumbler. Next you'll see a brass tumbler take its place, as seen in the 2nd photo. Do the same thing again and 3 more times and the cylinder will come out.
4) You may have to wiggle the latch catcher up and down a little to finish pulling out the cylinder.
5) To reinstall, with the tumblers pointing up and aligned with that window in the housing, and while holding the latch catcher up(closed position), shove the cylinder in, wiggling it as you go, until it bottoms out and you see the steel tumbler catch the window again.
6) If you don't have a key, so that you are unable to put the latch in the locked position, you can still get it out. Turn the switch knob to the horizontal position(as in the last photo). Actually, I believe if you pull the latch catcher to the up position, the switch will automatically turn to the horizontal position. You will be lining up the steel tumbler with the smaller window that is on the side of the lock housing at 3 o'clock. Be sure the latch catcher is still in the up(closed position) and do the same procedure as above. When you put the lock cylinder back in, line up the pins with the small hole on the side as you wiggle the cylinder back into the lock, while holding up the latch catcher. Once you get the lock cylinder all the way back in, that's about it, and the lock will work normally.