Noob question. Just wondering, i have a 03 silverado with the basic hood and grille. i want to put the HD hood and grille on. so i went to some wrecking yards and this dude said i had to change upper bumper pad, radiator support, and grille and hood. i thought it was just hood and grille. If i have to replace the radiator support then i dont think its worth the hassle. Please someone let me know. Thanks.