DIESELR CP3 Conversion Kit (2011-2016 Duramax 6.6L LML)

A Better Fuel System for Your LML Duramax

The DIESELR CP3 Conversion Kit for Duramax 6.6L LML (2011–2016) replaces the problematic factory CP4 with a proven CP3-compatible setup—without the guesswork. Built for truck owners who don’t want to gamble on a known weak point, this install-ready kit lets you make the change before failure strikes.

Why Diesel Owners Trust the CP3

The CP4 pump has earned its reputation for premature failure and expensive repair bills. This conversion kit eliminates that risk by allowing your engine to run a CP3 pump—known for better fuel delivery under load and long-term reliability. No performance fluff. Just solid components built for trucks that get used.

What's Included

• Fuel lines, fittings, brackets, and mounting hardware
• Designed to work with your choice of CP3 pump (not included)
• Factory-style fit with no unnecessary modifications
• Built to withstand high-heat and high-pressure environments

Fitment

Compatible with 2011–2016 Duramax 6.6L LML (Chevy & GMC 2500/3500 HD models)

Important Notice

This product is intended for competition and off-road use only. Use on emission-controlled vehicles may violate regulations. Always check local laws before installation.