GM 12491869 Engine 4.3L V6 LU3

( Brand: Gm ), ( Manufacturer Part Number: 12491869 ), ( Type: Engine Long Block ), ( Engine Size: 4.3 L ), ( Fuel Type: Gasoline )

Review GM 4.3l V6 Remanufactured Engine Lu3 Oem Factory fits 2001–2002

The GM 12491869 4.3L V6 engine, also known as the LU3 engine, was produced by General Motors between the years 2001 and 2002. This engine is a part of the Vortec series and is recognized for its dependability and power.

The LU3 engine boasts a displacement of 4.3 liters, which translates to a total of six cylinders. Each cylinder features a bore size of 3.91 inches and a stroke length of 3.44 inches, resulting in a total of 231 horsepower at 4,400 RPM and 298 lb-ft of torque at 3,200 RPM. This level of power output makes it an excellent choice for those seeking a balanced and robust engine.

This engine is known for its advanced engineering, including a cast iron block and aluminum cylinder head. The cylinder head incorporates quad-cam phaser technology, which helps optimize the intake and exhaust valves for improved performance and efficiency. Additionally, it utilizes sequential fuel injection, allowing for precise fuel delivery for each cylinder.

The LU3 engine is equipped with an overhead valve design, which ensures efficient combustion and optimal power delivery. It also features a multi-point electronic fuel injection system, which enables the engine to adapt to various driving conditions for maximum performance and fuel economy. Furthermore, the engine is outfitted with a hydraulic lifter system, which eliminates the need for periodic valve adjustments.

To meet emissions regulations, the LU3 engine incorporates several advanced emission control systems. These include an exhaust gas recirculation (EGR) system, which reduces nitrogen oxide emissions, and a catalytic converter, which converts harmful pollutants into less harmful gases before being released into the environment.

The GM 12491869 4.3L V6 engine, LU3, is a powerful and reliable choice for those seeking a versatile engine for their vehicle. Its advanced engineering, efficient combustion, and robust design make it a popular choice for those in search of a high-performing and dependable engine.

The 4.3L V6 Lu3 engine, produced by General Motors between 2001 and 2002, is a common powertrain option found in various GM vehicles. Here are some pros and cons that might help you make an informed decision about purchasing this engine.

1. Reliability: This engine is known for its durability and reliability. It has a robust design and can last for a long time with proper maintenance.

2. Power: The 4.3L V6 engine delivers a decent amount of power, making it suitable for those who prefer a responsive and powerful driving experience.

3. Availability: These engines are widely available on the used market, making them relatively easy to find and purchase.

4. Versatility: The Lu3 engine is used in a variety of GM vehicles, so parts and information are readily available.

1. Fuel Economy: The engine is not very fuel-efficient, which can lead to higher operating costs over time.

2. Maintenance: The engine requires regular maintenance to keep it running smoothly. Some components, such as the timing chain, may need to be replaced more frequently than others.

3. Emissions: The engine does not meet modern emissions standards, which can make it difficult to register and insure in some areas.

4. Noise: Some owners report that the engine can be noisy, especially when idling or under heavy load.

The 4.3L V6 Lu3 engine offers a good balance of power and reliability, but it comes with some drawbacks, such as poor fuel economy, high maintenance requirements, and noise. If you are looking for a powerful engine that can last a long time with proper care, this engine might be a good choice for you. However, if you prioritize fuel efficiency, low maintenance costs, or quiet operation, you might want to consider other options.

If you have your heart set on a 4.3L V6 engine and are willing to accept its drawbacks, then this engine could be a good fit for you. However, if you are looking for a more balanced powertrain, you might want to consider the 4.2L inline-six engine or the 4.6L Northstar V8 engine, which offer better fuel economy and quieter operation, but may not deliver the same level of power. Ultimately, the decision depends on your priorities and preferences.

Details:

Factory GM Good wrench remanufactured 4.3L V6 engine Part #12491869. This is the LU3 variant used in 2001 2002 Chevrolet and GMC trucks, vans, Blazer, Jimmy, Astor, Safari. Two available.

part #: 12491869 prices

• $29.89-$139.99

specifications grokengines:

• for years: 2001-2002
• brand: Gm
• mpn: 12491869
• type: Engine Long Block
• engine size: 4.3 L
• fuel type: Gasoline

seller grokengines:

• rating: 100.0%
• # reviews: 9
• city: Clovis, California

returns grokengines:

• policy: No Returns

payments grokengines:

• other
• credit card: Visa
• wallet: Paypal

shipping grokengines:

general grokengines:

• Car Truck Parts Accessories > Engines Engine Parts > Engines
• condition: Remanufactured

offer grokengines:

• quantity: 1
• availability: In Stock
• sold: 0
• best offers: True
• options: Ship-to-home
• started: June 6, 2025

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