LB7 Duramax Fuel System & Injectors

Protect your 2001–2004 Chevy Silverado or GMC Sierra 2500HD/3500HD from common injection issues with our full selection of LB7 Duramax fuel system parts and upgrades. Because the factory 6.6L common-rail platform lacks a factory lift pump, the CP3 injection pump must pull fuel under vacuum, accelerating wear on internal injectors. Adding an aftermarket FASS or AirDog lift pump, replacement Bosch injectors, high-flow fuel lines, or upgraded filter heads ensures clean, pressurized fuel delivery and maximum reliability. Browse our LB7 fuel components below to keep your truck running strong.