1996-1999 GMC P3500 7.4L V8. 1996-1999 GMC P3500 4.3L V6. 1996-1999 GMC P3500 5.7L V8. Notes: Smooth Pulley. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.