hmmm...
INSTEAD OF USING ZIP TIES, JUST MAKE SOME SMALL TABS OUT OF METAL, 'GLASS, A BROKEN GRILLE, ETC...AND THEN ATTACH THEM TO THE GRILLE SHELL(ABOVE THE OPENING, AND BELOW IT) MAKE YOUR GRILLE BIG ENOUGH THAT YOU LEAVE ABOUT 3/4 OF AN INCH ON THE TOP AND BOTTOM. THEN JUST USE SCREWS AND WASHERS BIG ENOUGH TO COVER THE HOLES IN THE MATERIAL(I AM ASSUMING YOU GUYS ARE TALKING ABOUT MAKING LIKE A SPEED GRILLE TYPE INSERT). ZIP TIES WILL STILL JIGGLE, AND CHIP YOUR PAINT, NOT TO MENTION BE A LITTLE TACKY ON A BRAND NEW TRUCK. IF IT WAS SOME OLD PEICE OF SH-T I COULD UNDERSTAND...LOL
IF MY EXPLANATION IS HARD TO UNDERSTAND, LET ME KNOW. SORRY BOUT THE CAPITALS, JUST NOTICED CAPS LOCK WAS STUCK ON....