OER Parts offers a wide selection of Apparel for your 1966 GMC 2500. OER Parts offers 1966 GMC 2500 Caps, Hats, Beanies, 1966 GMC 2500 Casual Shirts, 1966 GMC 2500 Children's Wear, 1966 GMC 2500 Gloves, 1966 GMC 2500 Jackets, 1966 GMC 2500 Long Sleeve Shirts, 1966 GMC 2500 Pit Crew Shirts, 1966 GMC 2500 Polo Shirts, 1966 GMC 2500 Sweaters & Sweatshirts, 1966 GMC 2500 T-Shirts & Tanks, and 1966 GMC 2500 Women's Wear.