Underneath your radio and climate controls, there's a plastic panel with the cigarette lighter built into it. That panel has to come out. There are screws at the top of the panel, and screws on each end that you get to by opening the glove box on the right, and removing the knee panel under the steering wheel on the left.
After the panel with the cig-lighter is removed, you can look up into the opening and see the bottom of your radio. There are 2 screws holding it in from the rear. Remove them and you can slide your radio out the front.
If you have factory keyless entry or a factory alarm, neither will function after your radio is removed.
Your dome light will no longer work with the door switch after the factory radio is removed. There is a fix for this that involves putting a jumper on two wires in the green plug you're going to remove from the factory radio.