OER Parts offers a wide selection of Brake Components for your 1961 GMC 2500 Series. OER Parts offers 1961 GMC 2500 Series Wheel Cylinders, 1961 GMC 2500 Series Front Wheel Cylinders 1961 GMC 2500 Series Rear Wheel Cylinders, 1961 GMC 2500 Series Wheel Cylinder Retainer, 1961 GMC 2500 Series Drum Brake Bleeder Screws, 1961 GMC 2500 Series Front Wheel Cylinder Repair Set, 1961 GMC 2500 Series Rear Wheel Cylinder Repair Set, and 1961 GMC 2500 Series Wheel Cylinder Pins.