OER Parts offers a wide selection of Apparel for your 1988 GMC R3500. OER Parts offers 1988 GMC R3500 Caps, Hats, Beanies, 1988 GMC R3500 Casual Shirts, 1988 GMC R3500 Children's Wear, 1988 GMC R3500 Gloves, 1988 GMC R3500 Jackets, 1988 GMC R3500 Long Sleeve Shirts, 1988 GMC R3500 Pit Crew Shirts, 1988 GMC R3500 Polo Shirts, 1988 GMC R3500 Sweaters & Sweatshirts, 1988 GMC R3500 T-Shirts & Tanks, and 1988 GMC R3500 Women's Wear.