C30 Hidden Hitches are a great idea for updating your GMC. For the ultimate in show and tow, get a Hidden Hitch. Show your creativity with new C30 Hidden Hitches. A Hidden Hitch will make sure that you show up in style. C30 Hidden Hitches add eye appeal to your truck. Hidden Hitches are great for trucks with roll pans. A Hidden Hitch is a great upgrade for any truck.