I painted and installed this grille this weekend. I purchased from my local Chevrolet dealer. They had it the next day. It is part# 84431359, it says Bison Grille on a tag on the inside. It was $390 including tax.
I saw a write up about removing the inner letter portion of the grille from the outer piece. I had a local shop put my trucks stock color, red, into a spray can and painted it. I then cleared it and then reassembled the 2 pieces back together. It was not too bad. I only broke 1 tab taking it apart.