Depending on the year of manufacture and body type, the attachment points may differ.
Front bumper
-open the hood.
-under the hood, unscrew the two nuts.
-at the bottom of the bumper, unscrew the two screws.
-turn the wheels to the side.
-in the wheel wells, unscrew three screws on each side that secure the fender liner (front).
-move the fenders to the side.
-for the fender liner, unscrew one screw on each side that attach the corners of the bumper to the wings.
-with an assistant, pull the bumper forward.
Rear bumper
-open the trunk lid.
-in the opening of the trunk, unscrew the three screws.
-in the wheel wells, unscrew three screws on each side that secure the fender liner (rear).
-move the fender liner to the side and unscrew one screw on each side that attach the corners of the bumper to the wings.
-at the bottom of the bumper, unscrew the screws (spun up).
-with an assistant, pull the bumper back.