For 1977-1978 GMC K35 Brake Master Cylinder Reservoir Cap Gasket Dorman. 1977 GMC K35 13 In. Rear Brakes;. 1978 GMC K35 13 In. Brake Master Cylinder Reservoir Cap Gasket. Master Cylinder Gaskets. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
