I test fitted the swap meet GMC grille to the AZ grille support and discovered that despite coming with a GMC grille, the AZ grille panel is for a Chevy.
The two holes for the top of the grille on each side match, but the two lower holes do not.
I marked out the location of the holes, but when I flipped the panel over to make sure I wasn't going to drill somewhere bad and discovered this:
That other hole in the brace next to the grille bolt hole? That is where the hole for the GMC grille is supposed to be. So if you're swapping from a Chevy grille to a GMC, just drill out that spot.
I used a spot weld cutter(exactly the right size, makes a clean hole) and made short work of drilling the holes.
Grille & Grille support then got painted black on the backsides.
I'd like to get these on the truck in primer this weekend, but the rain is slowing me down.