2011-2016 Duramax CP4 to CP3 Conversion Kit w/ Pump (Emissions Intact) (436401)

The 436401 is a direct CP4 replacement for the 2011-2016 6.6L Duramax LML that retains all factory emissions equipment. No check engine lights, no custom tuning, no programmers — the kit works with stock tuning and the truck runs as it did from the factory, just without the CP4 failure risk.

The CP3 fuel pump has a long-proven track record for longevity and reliability in performance applications. The CP4 has known failure issues that can't be remedied and, if they let go, can damage other major fuel system components downstream. Part Number: 436401

• Direct replacement for the factory CP4
• Will not cause check engine lights
• Works with factory tuning
• Designed for use with all factory emissions equipment
• CP3 pump proven for longevity and reliability

• Designed for factory OE trucks without tuning or modifications — factory emissions must be intact
• Core deposit applies — keep your old pump and return it to recover the deposit.