OEM GM roof racks may look like sets of non-descript bars on the roof of your car or truck. Their important job, however, is twofold. For one, roof rack systems provide a place to secure luggage. Secondly, they enable you to take on other gear, like a kayak or mountain bike. Hauling extras this way minimizes cabin and trunk space use. That means more room for passengers, extra cargo, or both. Roof racks are made up of simple components, modular by design. They include fitting kits to make them easier to install. The main part of any roof rack is its tower/foot set. This supports the weight of what you're transporting. Roof rack kits can also include crossbars. These both support towers and feet and transfer and distribute the weight on them. Some tower and foot sets can even lock. This helps ensure no one can remove your roof rack set without consent. What roof rack your GM car or truck needs depends on the model you drive. Some cars have roof racks, but not all. Most, you can find on trucks and SUVs, not to mention some vans. Regardless, genuine GM roof racks come designed the best storage expansion solution possible for a GM vehicle. You can order yours straight from the factory right here online, through our auto parts department. Ditto for roof rack accessories such as cross rails, rail nuts, and more. Buy now and get your ride hauling in no time!