I feel stupid asking this being that I've changed GM stereos several times but i'm having a prob taking the cover off on the center of the dash to remove the stock radio and installing an aftermarket one on my 87 Brougham RWD. There are two screws on the side of the cover that I removed, the bottom half lifts up but the top (where the A/C vents are) will not budge. There seem to be no other screws, I tried forcing it (kinda) and it feels like the cover will break. How do you remove this thing? Thanks for any help.