OER Parts offers a wide selection of Apparel for your 1978 GMC Truck. OER Parts offers 1978 GMC Truck Caps, Hats, Beanies, 1978 GMC Truck Casual Shirts, 1978 GMC Truck Children's Wear, 1978 GMC Truck Gloves, 1978 GMC Truck Jackets, 1978 GMC Truck Long Sleeve Shirts, 1978 GMC Truck Pit Crew Shirts, 1978 GMC Truck Polo Shirts, 1978 GMC Truck Sweaters & Sweatshirts, 1978 GMC Truck T-Shirts & Tanks, and 1978 GMC Truck Women's Wear.