Here is the set you need for the 2019 Sierra 2500 HD
https://www.sharptruck.com/truck-hardware-gmc-sierra-logo-with-black-wrap-gatorback-mud-flap-set-gb1223cutg-full-gb1223g-full-gb756802
It will have everything needed to install the flaps on the truck
Verified Answer
Admin answered on 12/1/2019