Fuel Contamination Kit | GM 6.6L L5P | 2020-23 | AP54822

OE Replacements: 11611340, 11611990, 12642410, 12643149, 12643771, 12648140, 12648141, 12651147, 12658352, 12665248, 12673878, 12677819, 12680216, 12684288, 12684289, 12685931, 12686808, 12686810, 12688014, 12698552, 12701094, 12707344, 12717296, 12718766, 12720156, 12720157, 12729812, 84740502, AP54800, AP54822, AP54850, PU9012/1Z

 

The Fuel Contamination Kit AP54822 is specifically designed for the 2020–2023 GM 6.6L Duramax L5P diesel engine. This all-in-one package provides the essential components to restore your complete high-pressure fuel system after contamination, ensuring long-term reliability and OEM-level performance.

Whether the issue stems from water intrusion, DEF misfill, or poor fuel quality, this kit is engineered to replace all critical parts and bring your L5P Duramax back to peak operating condition.

Why This Kit is Essential

Modern common-rail fuel systems, like the 6.6L Duramax L5P, operate at extremely high pressures and are very sensitive to impurities. Even a small amount of contamination can damage injectors, pumps, and lines. Attempting partial repairs often results in repeat failures.

The AP54822 kit provides a complete system refresh, preventing costly downtime and ensuring your truck continues to deliver maximum power and efficiency.

 

Key Features

Complete Fuel System Solution — includes high-pressure pump, injectors, lines, and seals.

OEM-Quality Components — engineered for durability and factory performance.

Restores Reliability — eliminates damage caused by water, DEF, or debris.

Cost-Effective Repair — one kit covers everything, saving time and labor.

Compatible with GM 6.6L L5P — designed for 2020–2023 Duramax applications.

 

What’s Included (Typical Kit Contents)

High-Pressure Fuel Pump (HPFP)

Complete Set of Fuel Injectors

Fuel Rails and Lines

Fuel Filters, Seals & Gaskets

Hardware for full installation

(Contents may vary by manufacturer; verify exact components before purchase.)

 

Benefits

Protects Your Engine Investment: Prevents future failures caused by hidden contamination.

Restores Power & Efficiency: Ensures proper fuel delivery and combustion.

Saves Time & Labor: One kit, one installation — no piecemeal repairs.

Trusted Solution: Used by professional diesel shops and fleet operators.

 

FAQs

Q: Is this kit compatible with all GM L5P Duramax trucks from 2020–2023?

A: Yes, it’s designed specifically for 6.6L L5P Duramax models within that year range.

Q: Can I just replace the failed injector or pump?

A: Partial repairs are not recommended — contamination affects the entire system, and only a complete kit ensures lasting results.

Q: Does this kit prevent future contamination?

A: It restores the system to OEM condition. Preventative care (using clean diesel, proper filtration, and avoiding DEF misfills) is required to avoid repeat issues.