Fleece Performance 11-16 GM 2500/3500 Duramax LML CP3 Conversion Kit w/CP3

The Fleece Performance 11-16 GM 2500/3500 Duramax LML CP3 Conversion Kit is a comprehensive upgrade designed to replace the factory CP4 fuel pump with a high-performance Bosch CP3. This kit enhances the durability and fueling capability of your LML Duramax engine, addressing common reliability issues associated with the OEM CP4 pump. It includes OEM-quality components such as a new Bosch CP3 high-pressure injection pump, molded fuel feed and return hoses, high-flow fuel fittings, and a valley feed line to support aftermarket lift pumps and filters. The kit is engineered for a no-tuning installation, providing a straightforward upgrade that improves fuel delivery and reduces the risk of costly failures.

Designed for 2011-2016 LML Duramax models, this kit is a direct bolt-on replacement that enhances fuel system reliability and performance. It is suitable for street use, towing, and daily driving applications where improved fueling capability is desired. The kit contains all necessary components, including the CP3 pump, high-pressure lines, fittings, mounting adapter, dosing injector feed line, regulator extension harness, fuel temperature sensor bracket, low-pressure fuel lines, and hardware. Compatible with the specified vehicle range, it offers a reliable upgrade to prevent CP4 failures and support aftermarket fuel system modifications.