OER Parts offers a wide selection of Body Panels for your 1987 GMC Truck. OER Parts offers 1987 GMC Truck Cowl Panels, 1987 GMC Truck Cowl Drain Flap, 1987 GMC Truck Side Cowl Panel, 1987 GMC Truck Cowl Panel Plugs , 1987 GMC Truck Cowl Drain Hose, and 1987 GMC Truck Cowl Gasket.