How do you Replace a radio in a 1999 Avalon?

the trim surrounding the radio must first be removed. to do this, use a screwdriver to pop the 2 clips at the bottom of the trim (you can probably see the small slits of where the clips are. once these are popped you can pop out the whole trim assembly and it's remaining clips. now there are four screws that hold in the radio, just remove those and the whole radio assembly will slide out as well.