On the 2005+, it's just a replacement/cover for the Toy Emblem & black plastic bars. You can keep the center bars or cut out the black plastic with a saw (sawz-all). You keep the shroud border. It can be a little unnerving to take a saw to your truck, but it's not hard. I elected to cut out the bars.
For the lower grill you don't have to cut anything but you still need to drill holes for the grill mounts (you have to take the front bumper off). It's not hard to do. You can take bumper and the shroud off with a screwdriver.
They have both a silver and a black version. You can see the instructions for the 2005+ on the Grillcraft site.