Hey folks, I ordered the weather tech mud flaps for my 2021 Yukon Denali with the retractable running boards. When you order, they will ask if you have the retractable running boards or the stationary ones. Mine had the retractable.
This installation was easy and no drilling was required. It uses the same screw mount holes that are holding some exterior together. Total time to install front and back was probably about 40 mins.
I then tested the running boards as they deployed and with them fixed up and down. No issues. It works great!
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Great information. Thanks a lot!