THE BEST IN CLASS LID. The best components and multiple adjustment points mean you get the best fit possible. The GMX2-R is a premium tonneau cover inside and out. Advanced with open-close tonneau cover control technology with electric shock absorber system (tonneau cover can be lift up toward the cab of the truck) Freedom of controlling; just press the switch and it will respond to all you wanted it to be. GMX2-R OEM Tonneau Covers gives your truck a sleek and stylish finish.