Amazon.com: 6.6L Duramax Diesel Fuel Filter with Head Assembly│Replacement For 2005-2012 Chevy Silverado GMC Sierra 2500 HD 3500 HD with Water in Fuel Sensor│Replaces# 12642623, 12639448, 904517 : Automotive
Do this, not that, during diesel engine fuel filter maintenance
Flow-MaX Add-On Post Fine Particle Fuel Filter Kit | 1050340-PFF | BD USA