Depending on the year of release of the attachment can vary.
Front bumper
-open the hood.
-under the hood, Unscrew the ten screws (spun down) that secure the cover plate and the upper part of the bumper.
-around the bottom part Unscrew the five screws (spun up).
-wrenched the wheel to the left or right side depending on which side we will analyze first.
-wheel arches Unscrew two screws on each side.
-we release the latch in the wings (gently pull the corners themselves).
-pulls the bumper forward (making sure not to break the wires).
-remove the connectors from the equipment (if any).
Rear bumper
-open the trunk lid.
-in the opening of the trunk, Unscrew the screws.
-Unscrew the screws around the perimeter of the bottom (spun up).
-in the wheel wells, Unscrew the screws holding the wheel arch liners, mud flaps and corners of the bumper.
-we release the latch in the wings (gently pull the corners themselves).
-release the clips under the rear lights.
-remove the back bumper (don't want to break the wires).
-remove the connectors from the equipment (if any).
How to remove front and rear bumper Chevrolet TrailBlazer (2001-2009)