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Chevrolet GMC LM2/LZO 3.0L Duramax Fuel Injector 2020-2025: OEM 55506244

CHEVROLET GMC LM2/LZO 3.0L DURAMAX FUEL INJECTOR 2020-2025: OEM 55506244

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$209.00

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 NUMBER55506244
PART TYPEFuel Injector
BRANDAC Delco
ENGINE MAKEChevrolet GMC
ENGINE TYPELM2/LZO 3.0L Duramax
YEAR2020-2025
PART NUMBER55506244

PRODUCT DESCRIPTION

This is a Genuine New, AC Delco Fuel Injector, AC Delco part number 55506244 ( OEM Part Number 55506244 ).This part is primarily made for a Chevrolet GMC LM2/LZO 3.0L Duramax, production years 2020-2025, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM55506244
Additional OEM55506244

ADDITIONAL DETAILS

CONDITIONGenuine New
UPC / Barcode
WEIGHT12.00 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.


This OEM 55506244 fuel injector is designed for Chevrolet and GMC trucks equipped with the LM2/LZO 3.0 L Duramax engine (2020–2025). It delivers precise fuel metering and spray patterns for optimized combustion, ensuring smooth engine performance, efficient fuel consumption, and lower emissions. As a direct-fit replacement, it’s a reliable choice for restoring factory-spec performance and long-term durability.

FITMENT CHART

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

PEOPLE ALSO ASKS | BLOG(S)

The fuel injector is one of the most critical parts of a diesel engine’s fuel system — and the Chevrolet / GMC LM2/LZO 3.0L Duramax Fuel Injector (OEM 55506244) is engineered to deliver precise fuel flow for optimal engine performance and efficiency. Ensuring you get the right, OEM-grade injector can significantly affect fuel economy, combustion quality, and engine longevity. For anyone running a 3.0L Duramax engine from model years 2020–2025, knowing what this injector does and why it matters can help you make an informed purchase.

This injector plays a crucial role in how your engine burns fuel — here’s why it stands out:

  • Precision Fuel Delivery – It supplies the exact amount of diesel fuel needed for efficient combustion, helping maximize power output while minimizing waste.

  • Consistent Engine Performance – A properly functioning injector helps maintain smooth engine operation, responsiveness, and reliable starts.

  • Improved Fuel Efficiency – Accurate fuel atomization and delivery support better fuel economy and reduce unnecessary fuel consumption.

  • OEM-Grade Reliability – As OEM 55506244, this injector meets the manufacturer’s specifications for proper fit, function, and durability under operating conditions.

  • Prevents Engine Issues – Replacing worn or faulty injectors helps avoid problems like rough idle, misfires, loss of power, or excessive smoke.

Replacing a failing fuel injector is essential for ensuring your engine runs smoothly, efficiently, and reliably. The Chevrolet / GMC LM2/LZO 3.0L Duramax Fuel Injector (OEM 55506244) offers the precision and quality needed to maintain optimal engine health and performance. Customers can trust Tamerx to provide high-quality, OEM-standard parts that help keep their diesel engines running strong and dependable.

Fuel injectors are essential components in modern engines, delivering the precise amount of fuel needed for clean and efficient combustion. While they are built to withstand high pressures and constant use, they will eventually wear out. Understanding the typical lifespan of a fuel injector—and what factors influence it—helps drivers plan maintenance and avoid unexpected engine issues.

Average Fuel Injector Lifespan

  • Standard Lifespan Range
    Most fuel injectors last between 80,000 and 150,000 miles, depending on driving habits and operating conditions.

  • Fuel Quality Matters
    Using clean, high-quality fuel extends injector life. Contaminated or low-grade fuel accelerates wear and clogging.

  • Importance of Regular Maintenance
    Routine fuel filter replacement helps prevent dirt and debris from reaching the injectors, significantly improving longevity.

  • Driving Conditions
    Stop-and-go traffic, heavy towing, or extreme temperatures can increase stress on injectors, reducing their lifespan.

  • Engine Warning Signs
    Symptoms such as rough idling, misfires, poor fuel economy, or smoke from the exhaust often indicate injectors nearing the end of their service life.

A typical fuel injector can last well over 100,000 miles when supported by clean fuel and proper maintenance. Paying attention to early warning signs and keeping up with routine service helps ensure consistent engine performance and avoids costly repairs. With good care, your fuel injectors can deliver reliable operation for many years.

Yes — a clogged or malfunctioning injector can reduce combustion efficiency, hurting mileage and overall fuel economy.

Yes — contaminants, water, or impurities in diesel fuel can accelerate injector wear or cause clogging over time.

Yes — inconsistent fuel delivery disrupts smooth combustion and can cause rough idle or vibrations.

After installation, it’s recommended to clear any fault codes and allow the engine’s ECU to relearn injector parameters.

Chevrolet GMC Fuel Injectors

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