Industrial Injection 11-15 GM Duramax 6.6L LML CP4 to CP3 Conversion Kit with Pump (Tuning Req.)

If you're looking to improve the reliability of your 2011-2016 Chevrolet Silverado 2500 HD or GMC Sierra 2500 HD equipped with the 6.6L Duramax LML engine, this CP4 to CP3 conversion kit from Industrial Injection is a solid option. The factory CP4 injection pump has known issues with fuel contamination and premature failure, especially when dealing with lower quality fuel or if the system is compromised. This kit replaces the problematic CP4 with a more robust and well-known CP3 injection pump, a design that has proven its durability over many years and applications.

This conversion kit includes the necessary components to swap out your CP4 for a CP3 pump. The CP3 pump is generally considered more tolerant of less-than-ideal fuel conditions and offers a more consistent fuel supply. Because this is a significant change to the fuel system, it's important to note that this kit requires custom tuning for your vehicle's computer to properly manage the new CP3 pump. Without the correct tuning, the engine will not run correctly, and you could potentially cause damage. Industrial Injection is a well-known name in the diesel performance and repair world, and this kit is built to help you address a common failure point in the LML Duramax engine.

When undertaking this conversion, ensure you have a plan for the required tuning. It's also a good time to inspect your entire fuel system for any potential contaminants that may have contributed to the original CP4 failure. This kit is designed to fit the 2011-2016 model years of the Silverado 2500 HD, 3500 HD, Sierra 2500 HD, and 3500 HD. Please be aware that this product is not CARB approved and cannot be shipped to California.