they fit as described with the unfortunate 2024 chevrolet 3500 HD factory mud flaps to wich i recommend nobody order from GM because they don't hang down enough to do anything, so you must use the Gator back mud flaps to go over them for protection from wheel debris,, Gator back knows what they are doing. Chevrolet and GMC do not have a clue on their 2500 and 3500 series about mud flaps. Do not order them!