The phrase "black grill" refers to a slang term used to describe a car or truck with a front grille that is painted or coated in black. Full definition
It gets a matte black grill with swept back headlights. (overdrive.in)
The Freelander XS gets gloss black grill surround, 17 ″ alloys and a bit of a body kit and the new Dynamic trim gets a full body kit, gloss black highlights, sports seats and 19 ″ 10 - spoke alloys with a paint finish. (carsuk.net)
The sugars in the soda caramelize in this sauce leaving the beautiful black grill marks you see, and adding a delicious caramelized flavor! (spachethespatula.com)