2011-2016 GMC Duramax 6.6 LML CP3 Conversion Kit

$7,135.37 +$800.00 core charge.

$7,935.37 total includes refundable core charge deposit of $800.00.

Core return shipping is free! Simply put your used part in the box, affix the included return label and ship. When we receive the eligible part you will be refunded your core deposit. Click here to read our core return policy.

2011-2016  GMC  Duramax 6.6 LML CP3 Conversion Kit

Choosing to convert your failed CP4 fuel pump to the earlier model CP3 fuel pump can be a big job. Let us help you with the conversion by providing you with everything you need to replace the contaminated parts with genuine OE parts including a brand new CP3 (no core required). When disaster strikes we are here to help you get your Duramax up and running with the reliable CP3 fuel system components.


With this in mind we are pleased to offer a CP3 conversion kit which contains:

  • 8 - Bosch REMAN OE Injectors 
  • 1 - Bosch NEW OE CP3 Pump 
  • 1 - Left Hand OE Rail 
  • 1 - Right Hand OE Rail w/Sensors 
  • 1 - OE Return line
  • 1 - CP3 Conversion Kit 
  • 8 - Injector Lines & Hold Down bolts 
  • 1 - OE Fuel Filter 


    • Replaces CP4 injection pump with reliable CP3 pump
    • CP3 pumps 25% more volume than CP4
    • No pump core required 

    Product Weight: 35.0 lb

    2011-2016 GMC Duramax 6.6 LML CP3 Conversion Kit is currently in stock and ready to ship within 24 business hours.

    We are currently only shipping to addresses in Canada.

    We offer free shipping to provinces in Canada on all orders over $200.00 and taxes are charged based on your provinces tax %. Items are shipped via Purolator Ground. Delivery dates are good faith estimates only and are quoted in "business days"; this does not include weekends and statutory holidays. PO Box addresses are not acceptable for delivery. For shipping to the Northern Territories, please e-mail us first for a rate quote.

    Free pick-up is available at our Edmonton location but you must provide your order number and show your identification.

    All orders under $200.00 are subject to a $25.00 shipping fee.

    For expedited shipping and more details, click on the link below:


    Customer Reviews

    Based on 1 review
    Hubert K. (Kelowna, British Columbia, Canada)
    LML CP3 Conversion Kit

    I purchased a 2011-2016 Duramax Disaster Kit with a CP3 pump the kit came with all the right items to replace the hole fuel system communication was great and very help full with any questions i had, the return core charge was applied in a timely matter
    all I can say is thank you