Part Type: Drum Brake Wheel Cylinder. 1973 GMC C35/C3500 Pickup Bore: 1.125 In. Position: Rear Left;. Manufacturer: Dorman. Position: Rear Left. Brake Component Inlet Thread Size: 3/8-24 IN. To confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in theCompatibility Table.
