1.If you plan on going with a wheel-and-tire combo with an OD over 26-inches and want to lay out your truck, you will have to trim and relocate some stuff on the front. To gain access on the front, the hood, grille, inner plastic fenders, and outer steel fenders are removed. Here's another case where GM has made things more complicated. In order to remove the fenders, the headlights have to be removed. And to get the headlights out, the bumper caps need to taken off.