CP3 Pumps

The LMM CP3 pump category is for the high-pressure fuel pump side of the 2007-2010 Duramax fuel system. Owners are usually chasing low rail pressure, hard starts, or a worn pump on an older truck.

Support parts include stock replacement CP3 pumps, upgraded CP3 pumps, regulators, install parts, and related high-pressure fuel components for GM Duramax LMM trucks. Verify fuel supply and injector return rates before assuming the CP3 is the only failed part.