OER Parts offers a wide selection of Oil System & Parts for your 1987 GMC Truck. OER Parts offers 1987 GMC Truck Bypass Valves, 1987 GMC Truck Dipsticks and Tubes, 1987 GMC Truck Filter Adapters, 1987 GMC Truck Oil Coolers, 1987 GMC Truck Oil Filters, 1987 GMC Truck Oil Pan Baffles, 1987 GMC Truck Oil Pans, 1987 GMC Truck Oil Pickup Tubes, 1987 GMC Truck Oil Pumps, and 1987 GMC Truck Oil Senders.