ECCPP Electric Fuel Pump Module Assembly w/Sending Unit Replacement for Chevrolet chevy Astro GMC Safari 1997 1998 1999 4.3L V6 E3940M COMPATIBILTY - ECCPP Electric Fuel Pump for 1997-1999 Chevrolet Astro 4.3L V6 ;1997-1999 GMC Safari 4.3L V6 FUNCTIONS - Suck the fuel from the fuel tank, pressurize it and then deliver it to the fuel supply pipe, and cooperate with the fuel pressure regulator to establish a certain fuel pressure. Guaranteed supply of continuous fuel to the injector DISCLAIMER - ECCPP Fuel Pump Assembly DOES NOT come with pressure sensor, the original black pressure sensor on the top of the assembly must be reused at time of installation BENIFITS - ECCPP Fuel Pumps are low noise pump, better driving comfort, balancing cost and reliability to meet different needs IMPORTANT NOTE - Please make sure to match the exact part numbers between this part and the part that you are replacing. Contact your mechanics, or send us a message to make sure it matches exactly in case of doubt before purchasing