How do you remove the door speaker covers on a 1999 s-10?

If you want to just replace the speakers: Remove window crank ( if present ), remove door panel screws. There are several plastic retainers holding the panel to the door. Gently pry the panel from the door at the sides and bottom, then pull the panel up and over the window lip. The covers are "plastic welded" to the panel. Cut the "welds" and pry off the cover.