There is an offset flap and bracket for the rear as well.
Front Flap: https://www.sharptruck.com/2020-gmc-sierra-25003500-hd-denali-black-wrap-logo-gatorback-mud-flaps-front-pair
Rear Flap: https://www.sharptruck.com/2020-sierra-3500-hd-gmc-denali-blackwrap-logo-gatorback-dually-mud-flaps-brackets-removable
Verified Answer
Admin answered on 9/23/2020