55489139 GENERAL MOTORS Duramax Engine Block I-6 Chevy Gmc

Review GENERAL MOTORS Used Oem Chevy Gmc Lm2 3.0l Duramax Engine Block for CHEVY GMC SILVERADO SIERRA I-6

Introducing the 55489139 Chevy Silverado and GMC Sierra LM2 3.0L Duramax I-6 engine block, a masterpiece of engineering designed to deliver exceptional power and efficiency. This engine block is the heart of the Duramax I-6 powertrain, an advanced propulsion system that sets new standards in diesel engine technology.

Crafted from high-strength materials, the engine block boasts a compact yet robust design that maximizes power output while minimizing weight. Its cast-iron construction ensures superior durability and heat resistance, making it ideal for the demanding requirements of heavy-duty pickup trucks.

The 3.0L Duramax I-6 engine block features a state-of-the-art common rail direct injection system that optimizes fuel delivery for maximum combustion efficiency. This innovative technology not only enhances power output but also reduces emissions and improves fuel economy.

The engine block's integrated exhaust gas recirculation system further refines the combustion process by returning a portion of the engine's exhaust gas back into the intake manifold. This recirculated gas helps to cool the combustion chamber and reduce harmful nitrogen oxide emissions.

The 55489139 Chevy Silverado and GMC Sierra LM2 3.0L Duramax I-6 engine block is also equipped with a variable geometry turbocharger. This advanced technology enhances engine performance by optimizing boost pressure at various engine speeds, providing ample power on demand.

In addition, this engine block features a durable forged steel crankshaft and connecting rods, ensuring optimal engine balance and longevity. The block also includes a cast-iron cylinder liner system that provides superior protection against wear and tear.

Finally, the 55489139 Chevy Silverado and GMC Sierra LM2 3.0L Duramax I-6 engine block is designed to meet stringent emissions standards while delivering impressive power and torque output. It is a true testament to the engineering prowess of the automotive industry and a must-have component for any heavy-duty pickup truck enthusiast.

The Chevy Silverado and GMC Sierra LM2 trucks, powered by the 3.0L Duramax I-6 engine block, have gained significant attention due to their impressive fuel efficiency and performance. Here are some pros and cons of buying this engine block for your vehicle:

1. Fuel Efficiency: The 3.0L Duramax I-6 engine block offers excellent fuel economy compared to larger V8 engines. It can return up to 30 mpg on the highway, making it an attractive option for those who prioritize fuel savings.

2. Power and Torque: Despite its size, the 3.0L Duramax I-6 engine block delivers impressive power and torque. It can produce up to 277 horsepower and 460 lb-ft of torque, providing ample power for towing and hauling heavy loads.

3. Durability: The Duramax engine is known for its durability and reliability. It features a robust design, including a forged steel crankshaft and aluminum alloy cylinder blocks, which can withstand the rigors of heavy-duty use.

4. Low Emissions: The 3.0L Duramax I-6 engine block meets stringent emissions regulations, making it an eco-friendly option for those who want to reduce their carbon footprint.

1. Limited Availability: The 3.0L Duramax I-6 engine block is not yet widely available in the used market. It is only offered in newer model years, so finding a used one may be challenging.

2. Higher Upfront Cost: The new 3.0L Duramax I-6 engine block comes with a higher upfront cost compared to older V8 engines. This may be a barrier for some buyers.

3. Limited Aftermarket Support: Due to its relatively new design, there may be limited aftermarket support for the 3.0L Duramax I-6 engine block. This could make it more difficult to find replacement parts or perform maintenance.

The 3.0L Duramax I-6 engine block offers impressive fuel efficiency, power, and torque, making it an attractive option for those who need a reliable and eco-friendly engine for their heavy-duty truck. However, its limited availability, higher upfront cost, and limited aftermarket support may be drawbacks for some buyers. Ultimately, the decision to buy this engine block depends on your specific needs, budget, and availability. If fuel efficiency and performance are your top priorities, and you can afford the upfront cost and potential maintenance challenges, then the 3.0L Duramax I-6 engine block may be an excellent choice for you. If, however, you need a more widely available and affordable engine option, you may want to consider other engine blocks.

If you are in the market for a heavy-duty truck engine and are prioritizing fuel efficiency, power, and torque, the 3.0L Duramax I-6 engine block is definitely worth considering. However, be prepared for the potential challenges of limited availability, higher upfront cost, and limited aftermarket support. If these factors are a concern, you may want to explore other engine options that may be more widely available and affordable, while still offering good fuel economy and performance. Ultimately, it's important to weigh the pros and cons carefully and make an informed decision based on your specific needs and budget.

Details:

Short block appears in good condition, rebuild recommended. No residential deliveries. Oil pan, adaptor plate, valve cover and other accessories not included. Used oem 2019 Chevy Gmc 1500 lm2 3.0l duramax I-6 short block engine 55489139, used genuine gm short block engine assembly, sold for parts or rebuild only, the was in a car fire.

Pickup at carrier terminal can be arranged. Parts affected by fire damage were removed.

specifications engineblocksam:

• for models: I-6, Silverado, Sierra
• for makes: Chevy, Gmc
• brand: General Motors
• mpn: 55489139
• type: Engine Block
• material: Cast Aluminum Alloy
• vintage part: No
• country of origin: United States
• performance part: Yes

general engineblocksam:

• category: Auto Parts > Car Truck Accessories > Engines > Blocks

payments engineblocksam:

• other
• credit card: diners-club
• wallet: paypal

returns engineblocksam:

• policy: no returns

shipping engineblocksam:

• service: flat rate freight
• type: fixed
• class: freight

seller engineblocksam:

• rating: 99.9%
• # reviews: 2804
• city: holland, michigan

offer engineblocksam:

• options: ship-to-home
• sold #: 10
• availability: in stock
• price: $2499.00
• item condition: For parts or not working
• best offers: true
• in stock #: 1
• started: february 13, 2026