Depending on the year of manufacture, the mounting points may differ slightly.
Front bumper
-open the hood.
-under the hood, we Unscrew the screws and pull out the pistons that attach the upper part.
-from the bottom side, pull out the pistons and Unscrew the screws.
-turn the wheels out of the way.
-in the wheel arches, we Unscrew the screws that fasten the undercarriage (the front part).
-we move the wing flaps to the side and Unscrew two screws on each side, which attach the corners to the wings.
-with an assistant, we pull the bumper forward (look for the wires).
-disconnect the electrical equipment connectors (if any).
Rear bumper
-open the trunk lid.
-remove the rear and bend off the side panels of the trunk.
-behind the side panels of the trunk, in the inner part of the wings, we Unscrew one nut and one screw on each side.
-we're pulling the pistons out of the trunk.
-in the wheel arches, we Unscrew the screws that fasten the undercarriage (the rear part).
-behind the wing flaps, we Unscrew one screw on each side (twisted from the bottom up), which attach the corners to the wings.
-carefully pull the bumper back (look for the wires).
-disconnect the electrical connectors.
How to remove front and rear bumper Buick Regal (2011-2017)