DMAX Fuel Filter Head Assembly (LB7) | DMAX Store DmaxStore Fuel Filter Head Assembly. Fits 2001-2004 Chevy / GMC 2500HD / 3500HD . Part# DMAX-061. Direct replacement for GM Part# 97780061 . 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 GM 12642623 Fuel Filter Head Assembly - XDP wwwmediesel›*XDP Manufacturers›GMThe GM 12642623 Fuel Filter Head Assembly for your 2004.5-2010 GM 6 Duramax is an OE factory replacement for your GM Duramax. Over time, the stock fuel filter head can leak or become damaged causing poor running conditions, hard starting and more.