1979 GMC P3500. 1980-1984 GMC P3500 Rear: Drum. 1985-1999 GMC P3500 Rear: Drum. Notes: Brake Wheel Cylinder. Notes:Single Rear Wheel. Position: Rear. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.
