DDP-DYNOMITE DIESEL PRODUCTS
DDP DDPNCP4-421 DURAMAX 11-16 LML BRAND NEW STOCK CP4
- SKU:
- DDPNCP4-421
- MPN:
- DDPNCP4-421
- Shipping:
- Calculated at Checkout
Description
The DDPNCP4-421 from Dynamite Diesel Performance is a brand-new CP4.2 injection pump, designed as a direct replacement for the 2011–2014 GM 6.6L LML Duramax. This new unit (not remanufactured) offers factory-level performance and durability, restoring precise fuel pressure and consistent injector function.
The CP4.2 fuel pump is a known weak link in the LML platform due to sensitivity to fuel contamination and wear. Replacing it with a new unit prevents common CP4-related failures and ensures long-term reliability.
Fitment Applications
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2011–2014 Chevrolet Silverado 2500HD / 3500HD
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2011–2014 GMC Sierra 2500HD / 3500HD
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Equipped with 6.6L Duramax LML
Not compatible with 2015–2016 models (use DDPNCP4-422)
Works with OEM or aftermarket fuel systems using the stock CP4 configuration
Key Features
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New CP4.2 injection pump – not rebuilt or reman
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Direct bolt-in replacement for early LML Duramax trucks
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Restores proper fuel rail pressure and injector function
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No core charge – 100% new product
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Ideal when replacing injectors or repairing CP4-related damage
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Works with stock or tuned ECMs
Recommended With
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New or upgraded injector sets for 6.6L LML Duramax
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CP4 disaster prevention kit
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Fuel system flush or replacement after pump failure
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Lift pump or advanced filtration system for added CP4 protection
If you’re refreshing the fuel system on your 2011–2014 Duramax, DDPNCP4-421 delivers factory performance and peace of mind with a brand-new CP4.2 pump – the only way to go for serious reliability.