The trim piece that surrounds the radio, which is has a thin piece over the steering column and to the other side, is held in with tabs. You just need a long screwdriver. Pry where it feels connected.
The blinky DIC means you need to take the gauge panel out. Either the harness is loose, corroded, or you need a new one. To take that out, start with the aforementioned trim panel around the radio and climate control, then the trim panel above the gauges, then the gauge panel. Chances are you need to loosen the light switch. Also the wiring to the gauge panel is likey too short to get a good look at to disconnect. You have to feel around. A little hint, the clips have two tabs that need to be bent out, not pushed in.