Alliant Power AP57024 Fuel Contamination Kit

Q: Why isn't flushing the LM2 fuel system enough after contamination?

Flushing alone is insufficient because contamination causes internal damage to precision fuel system components that cannot be corrected by flushing. Residual contamination left in the pump, injectors, or rail will continue damaging newly installed components after reassembly.

Q: What types of contamination does the AP57024 address?

The AP57024 covers LM2 Duramax fuel system remediation following DEF misfill, gasoline cross-fill, water intrusion, or debris contamination. It replaces the full fuel circuit in a single order.

20-22 GM 3.0L LM2 Duramax Pickup Alliant Diesel Contamination Kit

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Alliant Power AP57024 Fuel Contamination Kit - 3.0L Duramax LM2

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Refundable Core Charge

$4,193.57

Part Number: AP57024
Est. Ship Time: Usually Ships in 1-2 Business Days

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Core Charge - $750
A $750 refundable core charge applies to this kit. Customer is responsible for return shipping costs on the core.

The Alliant Power AP57024 is a complete fuel contamination kit for the 2020-2022 GM 3.0L Duramax LM2 engine - a one-box fuel system remediation covering the injection pump, injectors, fuel rail, in-tank pump, cooler, filter, return line, and sealing components. USA assembled in an ISO 9001:2015 certified facility, 100% end-of-line tested at 15 points, and backed by a 3-year unlimited mileage warranty. A $750 core charge applies.

Buy this if...

The truck is a 2020-2022 Chevrolet Silverado 1500 or GMC Sierra 1500 with the 3.0L Duramax LM2 and the fuel system has been contaminated - this kit replaces every critical fuel circuit component in one order and prevents the repeat failures that follow piecemeal repairs.
The goal is a complete OE-equivalent fuel system restoration with 100% tested components and a 3-year unlimited mileage warranty covering the full kit.

Do not choose this if...

The fuel system is intact and the goal is a performance upgrade - the AP57024 restores the LM2 fuel system to OE specifications after a contamination event, not a power increase.
The application is not a 2020-2022 Silverado 1500 or Sierra 1500 with the 3.0L LM2 Duramax - this kit does not cover other GM diesel applications or other model years.

Verify before ordering...

Confirm the engine is the 3.0L Duramax LM2 - check the window sticker or build sheet before placing the order.
Plan for the $750 core charge and confirm the rebuildable core is ready to return - customer is responsible for return shipping.

Why Complete Replacement Beats Flushing

When DEF, gasoline, water, or debris enters the fuel system of a 3.0L LM2 Duramax, flushing alone is not sufficient. Contamination travels through the full high-pressure circuit - injection pump, injectors, rail, in-tank pump, cooler, lines - and residual contamination in any one component will damage the others after reassembly. Every component in this kit is 100% end-of-line tested at 15 points before shipping.

For a confirmed contamination event on a 2020-2022 Silverado 1500 or Sierra 1500 LM2, this is the correct one-box remediation path. If the system is clean and the goal is more power, this is not the right kit. Confirm LM2 fitment and plan for the $750 core charge, then this is the part to order.

Warranty: 3-year unlimited mileage - Alliant Power backed

Testing: 100% end-of-line tested at 15 points before shipping

Assembly: USA assembled, ISO 9001:2015 certified facility

Components: 100% genuine OE or OE equivalent validated parts

What Comes in the Box

All critical fuel system components for a complete LM2 contamination remediation are included - nothing needs to be sourced separately for the core fuel system replacement.

1x Fuel Injection Pump Kit - Part # AP55216 (OE Equiv# 40009053)
3x Fuel Injector Kits Cyl 1, 2, 4 - Part # AP55129 (OE Equiv# 55506244)
3x Fuel Injector Kits Cyl 3, 5, 6 - Part # AP55130 (OE Equiv# 55506244)
1x Fuel Cooler Assembly (OE Equiv# 84740502)
1x Fuel Rail with Pressure Sensor and Relief Valve (OE Equiv# 55505909)
1x Fuel Pump in Tank (OE Equiv# 86507850)
1x Fuel Filter Assembly (OE Equiv# 13543066)
1x Fuel Return Line (OE Equiv# 55515929)
1x EGR Pipe Gasket (OE Equiv# 55497083)
1x Seal (OE Equiv# 55496593)

Part Number	AP57024
Fitment	2020-2022 Chevrolet Silverado 1500 / GMC Sierra 1500 3.0L Duramax LM2
Core Charge	$750 - customer responsible for return shipping
Warranty	3-year unlimited mileage
Testing	100% end-of-line tested at 15 points
Assembly	USA assembled - ISO 9001:2015 certified

Fitment Coverage

Fits the following 3.0L Duramax LM2 applications only:

2020-2022 Chevrolet Silverado 1500 3.0L Duramax LM2
2020-2022 GMC Sierra 1500 3.0L Duramax LM2

Avoid These Common Mistakes

Common Mistake:
Attempting a flush-only repair after a contamination event. The source explicitly states flushing alone is insufficient on the LM2 - contamination causes damage that requires full component replacement to prevent repeat failures.

Ordering by engine size or truck line without confirming the 3.0L LM2 Duramax specifically - the LM2 has unique fuel system components not shared with other GM diesel applications
Failing to plan for the $750 core charge before ordering - the core charge applies and the buyer is responsible for return shipping costs
Ordering this kit for a performance upgrade on an intact fuel system - the AP57024 is a contamination recovery kit that restores OE specifications
Assuming shop consumables or labor hardware are included - the kit covers the 10 core fuel system components; verify any additional install items with your shop before scheduling service

Before You Order

Truck is a 2020-2022 Chevrolet Silverado 1500 or GMC Sierra 1500
Engine confirmed as 3.0L Duramax LM2
Contamination event confirmed - this is a remediation kit, not a performance upgrade
$750 core charge budgeted and rebuildable core ready for return
Fuel injection pump confirmed included - no separate pump purchase required

For a 2020-2022 Silverado 1500 or Sierra 1500 with the 3.0L LM2 Duramax and a confirmed contamination event, the AP57024 is the correct one-box fuel system recovery - every critical circuit component included, 100% tested, and backed by a 3-year unlimited mileage warranty.

Frequently Asked Questions

Click or tap a question below to expand the answer.

Will the AP57024 fit my 2020-2022 Silverado 1500 or Sierra 1500 3.0L Duramax?

Yes, if the engine is the 3.0L Duramax LM2. This kit fits 2020-2022 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks equipped with the 3.0L LM2 only. Confirm the engine code on the window sticker or build sheet before ordering.

What is the $750 core charge and how does it work?

A $750 refundable core charge applies to the AP57024. After completing the repair, the old components must be returned as the core. The customer is responsible for return shipping costs. Plan for this before ordering and confirm the rebuildable core will be available to return.

Does the AP57024 include the fuel injection pump?

Yes. The kit includes the Fuel Injection Pump Kit (Part # AP55216, OE Equiv# 40009053) along with 6 fuel injectors in two cylinder-specific sets, fuel rail, in-tank fuel pump, fuel cooler, fuel filter assembly, fuel return line, EGR pipe gasket, and seal. No separate pump purchase is required.

Why isn't flushing the LM2 fuel system enough after contamination?

Flushing alone is insufficient because contamination - whether from DEF, gasoline, water, or debris - causes internal damage to precision fuel system components that cannot be corrected by flushing. Residual contamination left in the injection pump, injectors, or rail will continue damaging newly installed components after reassembly. Full component replacement is required to restore OE performance and prevent repeat failures.

What warranty does the AP57024 come with?

The AP57024 is backed by the Alliant Power 3-year unlimited mileage warranty. All components are 100% genuine OE or OE equivalent and validated, assembled in a USA ISO 9001:2015 certified facility, and tested at 15 end-of-line points before shipping.

What types of contamination does the AP57024 address?

The AP57024 is designed for LM2 Duramax fuel system remediation following contamination from DEF misfill, gasoline cross-fill, water intrusion, or debris. It replaces the full fuel circuit - pump, injectors, rail, cooler, in-tank pump, filter, return line, and seals - in a single order.