Air and Fuel› Fuel Pumps, Regulators and Components

Merchant Automotive

CP4 Fuel Injection Pump LML 2011-2016

$820.17

SKU: M01D 12661059

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Merchant Automotive CP4 Fuel Injection Pump is an OEM replacement for 2011-2016 GM Duramax LML diesels, designed to replace a broken pump. CP4 pumps are known for cam lobe wear issues, leading to catastrophic failure. LML Duramax engines lack lift pumps, so the CP4 pump draws fuel directly from the tank under vacuum.

Fitment

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Available on iOS & Android

Specifications

BrandMerchant Automotive
Part NumberM01D 12661059

Videos

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Crucial Mistakes to Avoid with Duramax Fuel Pressure Regulator installation
Bomba De Inyección 6.6L Duramax Cp4

Bomba De Inyección 6.6L Duramax Cp4
Finally a CP4 Fix!

Finally a CP4 Fix!
CP4/CP3 Talk with S&S Diesel Motorsport

CP4/CP3 Talk with S&S Diesel Motorsport

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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