OER Parts offers a wide selection of Brake Components for your 1987 GMC R3500. OER Parts offers 1987 GMC R3500 Wheel Cylinders, 1987 GMC R3500 Front Wheel Cylinders 1987 GMC R3500 Rear Wheel Cylinders, 1987 GMC R3500 Wheel Cylinder Retainer, 1987 GMC R3500 Drum Brake Bleeder Screws, 1987 GMC R3500 Front Wheel Cylinder Repair Set, 1987 GMC R3500 Rear Wheel Cylinder Repair Set, and 1987 GMC R3500 Wheel Cylinder Pins.