Pure Diesel Power, your number 1 diesel performance parts source!

Pure Diesel Power Price Match

live chat service provider

PDP Phone Number

PDP Email Signup


Free shipping on all orders over $150! Free Shipping on orders over $150! *Exclusions Apply

11-16 LML 6.6L Duramax Fuel System Replacement Kit

11-16 LML 6.6L Duramax Fuel System Replacement Kit




After a catastrophic CP4 failure, small metallic debris will be sent through the fuel system. To properly address this issue, all affected fuel system components need to be replaced. If you have experienced this failure, we have assembled a comprehensive fuel replacement kit for your LML 2011-2016 Duramax.

Our complete solution includes everything that GM recommends to be replaced and then some.

Choose Pump Option: CP4, CARB certified CP3 or no pump.

Install Kit Includes:

  • Fuel rails
  • Fuel injectors
  • Fuel lines
  • Master Filter Head Kit (Filters, filter head rebuild kit/spacer, WIF plug, bleeder screw, MA Additive)
  • and all the gaskets and seals to do the job.

The CP4 was introduced as a cost reduction to the LML platform since a smaller amount of fuel is required when running the more efficient injectors. Since its introduction, it has proven to be less reliable than the CP3 used in previous Duramax platforms.


No Tuning Required

CP3 is already re-calibrated to match the LML stock CP4 fuel curve

Kit is designed to replace the less reliable CP4 that comes stock on the LML

No posts found