OER Parts offers a wide selection of Apparel for your 1966 GMC 1500. OER Parts offers 1966 GMC 1500 Caps, Hats, Beanies, 1966 GMC 1500 Casual Shirts, 1966 GMC 1500 Children's Wear, 1966 GMC 1500 Gloves, 1966 GMC 1500 Jackets, 1966 GMC 1500 Long Sleeve Shirts, 1966 GMC 1500 Pit Crew Shirts, 1966 GMC 1500 Polo Shirts, 1966 GMC 1500 Sweaters & Sweatshirts, 1966 GMC 1500 T-Shirts & Tanks, and 1966 GMC 1500 Women's Wear.