Fuel System - OEM - Merchant Automotive Fuel System - OEM, LB7. Sort By: 97216064 Fuel Filter Head to FICM Hose, LB7, 2001-2004 Replacement hose from FICM to inlet side of fuel filter head . $59 Add To Cart . 97216065 Fuel Filter Head Outlet Hose, LB7, 2001-2004 OEM replacement hose coming OUT of the fuel filter head.Injector Line Retainer, LB7-t · LB7 Injector Cup, 2001-2004-T · Duramax Injection Pump LB7-t DMAX Fuel Filter Head Assembly (LB7) | DMAX Store Replace your worn or leaking filter head with a brand new unit. This is a direct replacement for your 2001-2004 LB7 Duramax and no fuel line modification is needed. Loss of Prime and low fuel rail pressure codes are common symptoms of a bad filter head.