CP4 Pumps

The LML CP4 pump category should stay separate from the CP3 conversion category. This is for owners replacing the factory-style CP4, not converting the truck to a CP3 setup.

CP4 replacement pumps, install parts, regulators, seals, and related high-pressure fuel system components fit 2011-2016 6.6L GM Duramax LML and LGH applications. If the system is already contaminated, the pump alone is not the whole repair.