You chose a 2021 GMC Carbon Pro truck bed for a reason, don’t negate that by tossing any old tonneau cover on top, choose a tonneau cover that’s engineered to be the best, be the most, a perfect fit, look, and performance for your 2021 GMC Carbon Pro truck bed, the Stowe 2 in 1 tonneau cover with integrated toolbox for 2021 GMC Carbon Pro!