Re: Chrome grill insert
We're talking about the mesh inside each of the seven vertical grille slots...like my Limited, you should have vertical black plastic grating within those slots. You can remove that mesh or grating within each of the slots and replace it with black plastic mesh which matches your lower trim panel within that lower chrome "mouth" under your license plate in your picture. That black mesh comes in the seven slots on the Overland. Or, like I did, you can use a chrome mesh within the seven slots which is what comes from the factory on the Summit.
You have the Luxury Group II package which adds the Overland headlights, panoramic roof, ventilated seats, etc., but doesn't change the grille inserts as far as I know.