Ready to ditch the unreliable factory CP4 pump on your 2011-2016 Duramax 6.6L LML? The GDP CP3 Conversion Kit has you covered, providing everything you need to make the switch to a CP3 pump without the hassle. Designed for durability and consistent performance, this conversion kit allows you to enjoy the benefits of a CP3 upgrade while protecting your engine from the dreaded CP4 failure.

This kit includes all the essential components—fuel lines, fittings, brackets, and hardware—needed to seamlessly replace your CP4 pump with a CP3, but does not include the pump itself unless added separately. Whether you’re looking to boost performance, enhance fuel efficiency, or simply safeguard your investment, this conversion kit makes it easy to take control of your fuel system.

Features:

• Complete Installation Kit: Comes with all necessary lines, fittings, brackets, and hardware to install a CP3 pump (pump not included unless added).
• Avoid Common CP4 Issues: Eliminate the risk of costly CP4 pump failure by switching to a more reliable CP3 setup.
• Performance Ready: Designed to ensure consistent fuel delivery and enhance overall engine performance.
• Built for Durability: High-quality materials and components that withstand the demands of high-performance driving.

Take charge of your fuel system and upgrade with the GDP CP3 Conversion Kit today. Don’t wait for a failure—be proactive and keep your Duramax running strong.

 Pump info

S&S Diesel Motorsport, the world leader in common-rail diesel injection has developed a solution for CP4.2 high-pressure pump failures that have plagued the LML Duramax engine. The S&S solution is to remove the problem before it becomes a problem, by replacing the CP4.2 with a tried and true, bulletproof CP3 high pressure fuel pump.

CP4 high pressure pumps are the Achilles heel of the LML Duramax engine because of high failure rates, and commonly taking out the entire, very costly, high-pressure system with it (injectors, rails, lines).

Returns Policy

1. General Return Policy:
   Due to the specialized nature of our products, we generally do not accept returns. Most items are VIN-specific or custom-built to order.
2. Defective Items:
   We only accept exchanges for defective items. We recommend professional installation for these items. If a product is defective and cannot be exchanged or repaired, a refund of the original purchase price will be issued upon receipt of proof of malfunction or damage.
3. Return Exceptions:
   In certain cases, we may make exceptions for returns. If your return request is approved, a 30% restocking fee will be applied. All items must be returned in their original packaging, and return shipping costs will not be refunded.
4. Cancellations:
   All sales are final. If you cancel your order after it has been placed but before it has shipped, a 5% processing fee will apply.
5. Non-Returnable Items:
   Certain items, such as hard parts (e.g., EGR kits, DPF pipes/exhaust, pyro kits, throttle valve kits, exhaust tips, and intakes), are not eligible for return unless an exception is made. If an exception is granted, a 30% restocking fee will be applied, along with the cost of return shipping.

Contact Us
Before returning any items, please contact us for specific shipping instructions.