From other threads:
MMD - Pull outward firmly for this stage. Just keep in mind that re-installing them can be tricky. There are four tabs on the backside of each bumerette, they are pliable. Bend the lower tabs outward and slide them under the base. Using a skinny screwdriver or small pick, pry the upper tabs out and into the slot on the top of the bumperette base.
MMD - I'd recommend NOT removing the bumperettes. Why? The tabs on the right bumperette were "deformed" and not very long making them unreliable for reattaching them securely to the "crash pad" behind the bumperettes. I suspect the crash pad and bumperette are assembled at Ford off the truck making it much easier to put them together. And I believe the bumperette assembly is bonded to the Raptor's bumper with one-time adhesive. I'd like to find out if this is true. And I'd like to see what the cost of a set of bumperettes is like.
SocoMech - The bumperettes have 4 tabs on the back that need to be pryed over the edge to hold on, that's where a pick tool with a hook or long skinny srewdriver comes in.