Fits 2003-2007 Freightliner Classic. 2003 Freightliner Classic Engine: 12L -6; Smooth; Position: Fan and Alternator;. 2004 Freightliner Classic Engine: 12L -6; Smooth; Position: Fan and Alternator;. 2004 Freightliner Classic Engine: 14.6L L6; Position: Smooth Pulley;.