OER Parts offers a wide selection of Brake Components for your 1966 GMC G1000 Series. OER Parts offers 1966 GMC G1000 Series Wheel Cylinders, 1966 GMC G1000 Series Front Wheel Cylinders 1966 GMC G1000 Series Rear Wheel Cylinders, 1966 GMC G1000 Series Wheel Cylinder Retainer, 1966 GMC G1000 Series Drum Brake Bleeder Screws, 1966 GMC G1000 Series Front Wheel Cylinder Repair Set, 1966 GMC G1000 Series Rear Wheel Cylinder Repair Set, and 1966 GMC G1000 Series Wheel Cylinder Pins.