There's a plastic cover on both front and rear bumpers, with front bumpers having extra support underneath they all share. You have to take off the radiator
Grille before you can take out the headlight housings. Unscrew the fasteners that hold the bumper ends in the front wheelwell, and by releasing the top tabs on Durango models, you can lift off the whole bumper cover. Reinstallation follows the reverse order. Before taking out the bumper support, unscrew and take off the bumper cover. If your vehicle has factory lights, also disconnect the fog lamp wires. For Durango models, take away the screws near the fog lamp before removing the bumper support. Reassembly goes back the same way you took it apart. To take off the back bumper cover on Durangos, open the liftgate, loosen the top screws, then unscrew the fasteners holding down the sides and bottom, and slide off the rear bumper cover from your vehicle - reinstallation happens in the opposite order.