OER Parts offers a wide selection of Brake Components for your 1999 GMC All Models. OER Parts offers 1999 GMC All Models Brake Lines & Hoses, 1999 GMC All Models Brackets, 1999 GMC All Models Brake Valves, 1999 GMC All Models Clips, 1999 GMC All Models Distribution Block, 1999 GMC All Models Fittings and Tees, 1999 GMC All Models Rubber Hoses, 1999 GMC All Models Shields, and 1999 GMC All Models Steel Lines.