− Decrease quantity for Tonneau Covers, BakFlip MX4, Hard Cover Style, Folding, Aluminum, Black Matte, 5.5 ft. Truck Bed Length, GMC, Each Quantity + Increase quantity for Tonneau Covers, BakFlip MX4, Hard Cover Style, Folding, Aluminum, Black Matte, 5.5 ft. Truck Bed Length, GMC, Each Add to cart