2015 GMC Sierra 1500 Custom Grilles

Grille looks great once installed. However. There were no installation instructions so you don't know that you have to reuse the air duct from the original grille and that the retainers for attaching it to the this grille need to be removed from the old grille. There are 2 tabs on the grille to bumper filler panel (center left and center right) that need to be removed because this grille doesn't have slots for them to fit into. Anyone with a 1/2oz. of sense should be able to figure this out but it would be nice to know in advance. I'd have given it a 5 other than this.