Here is a link to the mud flap delete kit:
Buy Truck Hardware part # FC003K. Low prices & free shipping on 2019-2022 GMC Sierra 1500 Finishing Caps - 6 Piece.
www.sharptruck.com
For the “front, rear” piece, meaning the front fender piece closest to the doors, I also removed the factory bracket behind the wheel-liner that holds the mud flaps to allow for extra tire clearance. When you do this, the back hole for that piece in this kit doesn’t have anything to screw into, so I just cut that part off cleanly with a jigsaw.
Trim pieces look and feel exactly like the factory plastic trim around fender, so very happy with the product and highly recommend if you like the look. I def prefer it and provides the room in front fenders for larger tires. Thanks and good luck!