1996 GMC P3500 Engine: DIESEL;. 1997 GMC P3500 Engine: DIESEL;. 1998 GMC P3500 Engine: DIESEL;. 1999 GMC P3500 Engine: DIESEL;. Part Type: Vacuum Pump. Vacuum Port Quantity: 1. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
