Product Description:
The factory CP4 injection pump is notorious for sudden, catastrophic failure. When a CP4 goes, it often sends metal debris through the entire fuel system, resulting in a $10,000+ repair bill. Our CP3 Conversion Kit is the ultimate preventative maintenance for your 2011–2016 LML Duramax, replacing the fragile factory pump with the legendary reliability of the Bosch CP3.
Why Upgrade to our CP3 Conversion?
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Top Tier Reliability: The CP3 pump design has been the gold standard for Duramax performance and longevity for decades.
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OEM Fit & Finish: Featuring Doctor Diesel exclusive molded hoses for fuel feed and return—no universal "hacks" or messy routing.
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High-Flow Performance: Includes high-flow CP3 fuel fittings and a valley feed line designed to support aftermarket lift pump applications perfectly.
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50-State Legal: Fully compliant with emissions standards (CARB EO# D-834-1).
Kit Contents
Everything you need for a professional installation (hardware only):
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CP3 to Rail High-Pressure Fuel Line
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CP3 Mounting Adapter & Hardware Kit
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High-Flow Feed & Return Fittings
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Exclusive Preformed Molded Fuel Hoses
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Dosing Injector Distribution Block & Lines
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Low-Pressure Fuel Feed Line
Technical Specifications & Fitment
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Vehicle: 2011–2016 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD
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Engine: 6.6L LML Duramax Diesel
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Manufacturer Part #: DD-LMLCP3
[!IMPORTANT] PLEASE NOTE: This is a "No Pump" kit. It includes all necessary brackets, lines, and hardware to adapt a pump to your truck, but the CP3 injection pump itself is sold separately. This allows you to choose the specific pump (LBZ/LMM based) that best fits your performance goals.
