Merchant Automotive Fuel Contamination Kit with GM Injectors and GM Fuel Pump L5P| 2024 - 2025

Merchant Automotive Fuel System Contamination Kit – L5P Duramax | 2024 - 2025

When diesel fuel contamination occurs, it can cause severe damage to your L5P Duramax’s fuel system—including injectors, pumps, fuel rails, and return lines—leading to poor performance, misfires, or complete failure. The Merchant Automotive Fuel System Contamination Kit offers a complete, OEM-quality solution for restoring the fuel system and preventing long-term damage after a contamination event.

Engineered for 2024–2025 L5P Duramax trucks, this comprehensive kit includes all essential fuel system components along with the necessary gaskets, seals, o-rings, and hardware to ensure a full and proper installation. Whether you're servicing a recent model or updating a prior repair, this kit has you covered with premium-grade components built for long-term reliability.

Kit Features:

Full restoration kit for L5P fuel system contamination repair

Covers model years 2024 through 2025

Includes high-quality OEM or better components

Restores proper fuel delivery and protects against future damage

Reduces downtime and costly repairs by replacing all affected parts at once

Kit Contents (Fits 2024–2025 L5P Duramax):

Fuel System Components:

(8) High Pressure Fuel Injectors

Fuel Injection Pump – L5P

High Pressure Fuel Feed Lines (To Rail and Crossover)

Fuel Rails – LH & RH

Fuel Injector Line Kit – L5P Duramax

Fuel Injection Fuel Return Pipes – LH & RH

Fuel Injection Fuel Return Hoses – Multiple locations (LH & RH pipes)

Fuel Feed and Return Pipe Assembly

Fuel Cooler – L5P 

Low Pressure Diesel Hydrocarbon Injector

Fuel Filter – Duramax

Seals, Gaskets, and Hardware:

Bolt, Fuel Injector Bracket

Fuel Injection Pump Pulley Nut

Seal, Upper Intake Manifold

Engine Coolant Thermostat Housing Gasket

Thermostat Bypass Pipe Gasket – L5P

Thermostat Bypass Pipe O-ring

Seal, EGR Coolant Feed Pipe

Gasket, EGR Cooler Pipe

Gasket, EGR Pipe (x2)

EGR Valve Gasket – L5P

Seal, Turbo Air Inlet Adapter

Throttle Body Gasket