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LML Duramax DDP CP4-421 Remanufactured CP4 Injection Pump

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    DDP CP4-421 Remanufactured CP4 Injection Pump – 2011-2016 6.6L LML Duramax

    Restore proper high-pressure fuel delivery to your 2011-2016 GM 6.6L Duramax LML with the DDP CP4-421 remanufactured CP4 injection pump. This is a direct-fit, stock-replacement Bosch-style CP4.2 high-pressure pump remanufactured to original equipment specifications.

    The pump delivers the same factory fuel volume and rail pressure as the OEM unit, making it a straightforward replacement when the original pump has failed or is due for service. It installs as a drop-in unit with no modifications required and is designed to work with the stock common-rail fuel system on LML (and compatible LGH) applications.

    Key details:

    • Fits 2011-2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with 6.6L Duramax LML
    • Compatible with LGH applications (Express/Savana vans and certain medium-duty trucks)
    • Stock power level and fuel output
    • Remanufactured to OEM specifications
    • Ready to install

    This remanufactured DDP unit gives you a cost-effective way to get your Duramax back on the road while maintaining factory fuel-system performance.

    Purchase LML Duramax DDP CP4-421 Remanufactured CP4 Injection Pump

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    LML Duramax DDP CP4-421 Remanufactured CP4 Injection Pump SKU: ddpCP4-421

    $688.75

    Qualifies for Free Shipping Over $199

    Fits: LML Duramax 2011-2016
    Warranty: 1 Year / Unlimited Mileage

    California Restricted


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    DDP CP4-421 Remanufactured CP4 Injection Pump – 2011-2016 6.6L LML Duramax

    Restore proper high-pressure fuel delivery to your 2011-2016 GM 6.6L Duramax LML with the DDP CP4-421 remanufactured CP4 injection pump. This is a direct-fit, stock-replacement Bosch-style CP4.2 high-pressure pump remanufactured to original equipment specifications.

    The pump delivers the same factory fuel volume and rail pressure as the OEM unit, making it a straightforward replacement when the original pump has failed or is due for service. It installs as a drop-in unit with no modifications required and is designed to work with the stock common-rail fuel system on LML (and compatible LGH) applications.

    Key details:


    Fits 2011-2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with 6.6L Duramax LML

    Compatible with LGH applications (Express/Savana vans and certain medium-duty trucks)

    Stock power level and fuel output

    Remanufactured to OEM specifications

    Ready to install


    This remanufactured DDP unit gives you a cost-effective way to get your Duramax back on the road while maintaining factory fuel-system perform[...]

    DDP CP4-421 Remanufactured CP4 Injection Pump – 2011-2016 6.6L LML Duramax

    Restore proper high-pressure fuel delivery to your 2011-2016 GM 6.6L Duramax LML with the DDP CP4-421 remanufactured CP4 injection pump. This is a direct-fit, stock-replacement Bosch-style CP4.2 high-pressure pump remanufactured to original equipment specifications.

    The pump delivers the same factory fuel volume and rail pressure as the OEM unit, making it a straightforward replacement when the original pump has failed or is due for service. It installs as a drop-in unit with no modifications required and is designed to work with the stock common-rail fuel system on LML (and compatible LGH) applications.

    Key details:

    • Fits 2011-2016 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD with 6.6L Duramax LML
    • Compatible with LGH applications (Express/Savana vans and certain medium-duty trucks)
    • Stock power level and fuel output
    • Remanufactured to OEM specifications
    • Ready to install

    This remanufactured DDP unit gives you a cost-effective way to get your Duramax back on the road while maintaining factory fuel-system performance.

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