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20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57026

20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57025
20-23 Duramax L5P Fuel System Contamination Kit With DCR Pump AP57026
$7,209.00

  • Part Number: AP57026
  • Est. Ship Time: Usually Ships in 1-2 Business Days
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The Alliant Power AP57026 Fuel System Contamination Kit is designed for 2020-2023 GM 6.6L Duramax L5P pickup trucks and provides a complete solution for repairing a contaminated diesel fuel system.

This kit includes all essential high-pressure fuel system components along with a DCR high pressure fuel pump upgrade to restore proper fuel delivery and improve long-term reliability.

Fuel contamination can occur from water intrusion, diesel exhaust fluid (DEF) entering the fuel tank, or debris circulating through the fuel system. When contamination occurs, it can damage injectors, fuel rails, and high-pressure fuel pumps, requiring replacement of affected components.

If your fuel system has experienced contamination, replacing all affected components is critical to prevent repeat failures.

Learn more about diesel fuel contamination repair kits

No Core Charge Applies!

Why Fuel Contamination Causes Major Diesel Fuel System Damage

  • Metal debris from pump failure circulates through the entire fuel system
  • DEF contamination destroys injectors and fuel pumps
  • Water contamination reduces fuel lubrication
  • Modern high-pressure diesel systems operate with extremely tight tolerances

Features and Benefits

  • DCR fuel pump included for improved reliability
  • Injectors and pump are 100% end-of-line tested
  • Includes essential components to restore the entire high-pressure fuel system
  • Designed specifically for 2020-2023 Duramax L5P trucks
  • Engineered for durability and consistent fuel pressure

Fitment

Vehicle Engine Years
Chevrolet Silverado 2500HD 6.6L Duramax L5P 2020-2023
Chevrolet Silverado 3500HD 6.6L Duramax L5P 2020-2023
GMC Sierra 2500HD 6.6L Duramax L5P 2020-2023
GMC Sierra 3500HD 6.6L Duramax L5P 2020-2023

Related Duramax Fuel System Parts

Symptoms of Fuel System Contamination

  • P0087 fuel rail pressure low code
  • Hard starting or extended crank
  • Sudden loss of power
  • Rough running engine
  • Metal debris in fuel filter
Not sure if this is the right setup?
See our CP4 vs CP3 vs DCR vs Disaster Prevention Kit guide to compare all options.

Frequently Asked Questions

Click each question below to expand the answer.

What causes diesel fuel contamination?
Fuel contamination can occur from water intrusion, DEF entering the fuel tank, debris entering the fuel system, or fuel pump failure.
Why replace the entire fuel system after contamination?
Contaminants and metal debris can spread throughout the fuel system damaging injectors and rails. Replacing affected components prevents repeat failures.
What is a DCR fuel pump?
A DCR pump is a high pressure diesel injection pump designed for improved durability and consistent fuel pressure delivery.
Will this kit fit earlier L5P trucks?
This kit is designed specifically for 2020-2023 Duramax L5P pickup trucks.
 
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