Restore high-pressure fuel delivery, stable rail pressure, and dependable performance on your 2006-2010 GM 6.6L Duramax LBZ/LMM with this new genuine Bosch CP3 fuel injection pump. This direct-replacement pump helps correct fuel system concerns such as hard starting, low rail pressure, poor throttle response, reduced power, fuel pressure codes, and drivability issues under load. Bosch: 0445020105, 0 445 020 105 Installation Note: Verify fuel system contamination, filtration, and related rail pressure diagnostics before installation. Fitment Note: Verify build date, VIN, engine application, emissions package, and existing pump part number before ordering.