Lift the tailgate to a fully open position.
Locate the screws securing the old tailgate insert in place. These screws are usually located along the perimeter of the insert.
Use a screwdriver to carefully remove the screws, being careful not to strip them. Set these screws aside—you will reuse them.
Remove the old insert from the tailgate. If it’s been in place for a while, you may need to gently lift or wiggle it free.