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Chevrolet GMC LM2/LZO 3.0L High Pressure Fuel Pump 2020-2025: OEM 40009053

CHEVROLET GMC LM2/LZO 3.0L HIGH PRESSURE FUEL PUMP 2020-2025: OEM 40009053

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$695.00

CORE CHARGE:

$250.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER40009053
PART TYPEHigh Pressure Fuel Pump
BRANDAC Delco
ENGINE MAKEChevrolet GMC
ENGINE TYPELM2/LZO 3.0L
YEAR2020-2025
PART NUMBER40009053

PRODUCT DESCRIPTION

This is a Genuine New, AC Delco High Pressure Fuel Pump, AC Delco part number 40009053 ( OEM Part Number 40009053 ).This part is primarily made for a Chevrolet GMC LM2/LZO 3.0L, production years 2020-2025, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM 40009053
Additional OEM 40009053, 55510777

ADDITIONAL DETAILS

CONDITION Genuine New
UPC / Barcode 00840490535848
WEIGHT 12.00 LBS

SHIPPING OPTIONS

Ship Weight : 12.00 LBS
UPS Ground, 2nd Day Air, Next Day Air

SHIPPING POLICY

Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.

The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.

Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.

Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".

If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.

As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.

What is a Core Charge?

A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.

30 Day Core Charge Hold

You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.

The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.

The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.

All fluids must be drained.

If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.

Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.


Engineered for Chevrolet and GMC LM2 and LZO 3.0L diesel engines from model years 2020–2025, OEM 40009053 is a high-pressure fuel pump designed to supply fuel to the common rail system with controlled pressure management. This pump is built to OEM specifications to ensure proper fitment and seamless compatibility with factory fuel system assemblies. Constructed from durable materials, it is capable of handling the operating demands typical of modern diesel applications. The component helps maintain steady fuel flow and consistent pressure during normal engine operation. It is a reliable solution for fleet service and targeted repair needs requiring dependable fuel system performance.

FITMENT CHART

YEARMAKEENGINE(S)
2020Chevrolet GMC LM2/LZO 3.0L
2021Chevrolet GMC LM2/LZO 3.0L
2022Chevrolet GMC LM2/LZO 3.0L
2023Chevrolet GMC LM2/LZO 3.0L
2024Chevrolet GMC LM2/LZO 3.0L
2025Chevrolet GMC LM2/LZO 3.0L

PEOPLE ALSO ASKS | BLOG(S)

The main role of the Chevrolet GMC LM2/LZO 3.0L High Pressure Fuel Pump 2020–2025: OEM 40009053 is to generate and supply the high fuel pressure required for the engine’s common rail injection system.

In the 3.0L Duramax LM2 and LZO diesel engines, fuel must be delivered to the injectors at extremely high pressure to ensure precise atomization and efficient combustion. The high-pressure fuel pump draws fuel from the low-pressure supply system and compresses it to the levels needed by the common rail. From there, the engine control module regulates injector timing and fuel quantity based on operating conditions.

This pump plays a critical role in maintaining consistent rail pressure under varying loads, speeds, and driving conditions. Without stable high-pressure fuel delivery, injector performance would be affected, leading to rough operation, reduced efficiency, or potential drivability concerns.

The primary responsibilities of OEM 40009053 include:

  • Pressurizing fuel for the common rail system
  • Maintaining consistent rail pressure
  • Supporting precise injector operation
  • Working in coordination with the engine control module

Designed specifically for 2020–2025 LM2 and LZO 3.0L applications, this high-pressure fuel pump is essential for proper combustion, emissions control, and overall engine reliability.

You should replace your high pressure fuel pump when diagnostics confirm it can no longer maintain proper fuel pressure or when internal damage is present. Because the pump supplies extremely high pressure to the fuel rail and injectors, failure can quickly lead to drivability issues and widespread fuel system damage.

Replacement becomes necessary when pressure-related problems persist after verifying fuel quality, filter condition, and low-pressure supply performance. Ignoring early warning signs can result in metal contamination spreading through the entire fuel system.

Midway through the evaluation process, the following conditions typically indicate high pressure fuel pump replacement is required:

  • Persistent fuel rail pressure codes
  • Commanded vs. actual rail pressure mismatch
  • Hard starting or extended crank times
  • Sudden loss of power under load
  • Metal shavings found in fuel filters or lines
  • Pump unable to build or hold specified pressure

If metal contamination is confirmed, the repair may require more than just replacing the pump. Injectors, fuel rail, lines, and the fuel tank may need inspection or cleaning to prevent repeat failure.

High pressure fuel pump replacement should be based on verified testing and inspection results. Addressing root causes such as poor fuel quality, clogged filters, or low supply pressure is essential before installing a new pump to ensure long-term reliability and protect the entire fuel system.

It supplies the high-pressure fuel needed for the injectors to deliver measured amounts to the engine.

Yes, it is manufactured to original equipment specifications for direct fitment on compatible engines.

Yes, irregular fuel pressure from a worn pump can trigger fuel system diagnostic trouble codes.

Yes, it communicates with sensors and the engine control module to help maintain correct rail pressure.

Chevrolet GMC High Pressure Fuel Pumps