NEW PREMIUM QUALITY GENUINE HERKO FUEL PUMP ASSEMBLY. THIS FUEL PUMP ASSEMBLY FITS THE FOLLOWING TRUCKS (PLEASE CHECK COMPATILIBLITY TABLE SPECIAL NOTES). High Country; LTZ Model; with Steel Cover. LT Model; WT Model; 69.3 bed; with Steel Cover. THIS IS FUEL PUMP ASSEMBLY INCLUDES THE SENDING UNIT. HERKO PART NUMBER: 578 GE. Co mpetitive advantages that differentiate us from others. Better feedback than our competitors, we know the importance of customer service. Powered by Herko WebApp.