fits model: 2500, 3500, Lml, Sierra, Silverado. make: Chevrolet, Gmc. year: 2011–2015.

( Brand: Duramax ), ( Manufacturer Part Number: 12638502 ), ( Engine Size: 6.6 L ), ( Type: Complete Assembly ), ( Fuel Type: Diesel ), ( Oe/oem Part Number: 12638502, 704-1 ), ( Number Of Valves: 32 ), ( Items Included: Adapter Plate, Belt Driven Accessories, Exhaust Manifold, Fan Clutch Assembly, Flywheel, Glow Plugs, High Pressure Injection Pump, Injectors, Intake Manifold, Oil Pan, Turbo, Valve Covers, Wiring Harness ), ( Transmission Model: Allison 1000 ), ( Engine Hp: 397 ), ( Gear Ratio: 3.73 ), ( Torque: 765 Lb-ft ), ( Emissions: Deleted )
The Duramax 12638502 is a high-performance diesel engine specifically designed for the 2011 to 2015 Chevrolet Silverado 2500 and 3500 HD models, as well as the GMC Sierra 2500 and 3500 HD vehicles. This engine is a part of the LML (Late Model L2) series, which is renowned for its power, durability, and efficiency.
The Duramax 12638502 is a 6.6L (6600 cc) V8 engine that delivers an impressive amount of torque and horsepower. It is equipped with a turbocharger and intercooler to enhance performance, allowing it to produce up to 397 horsepower at 3,000 RPM and an impressive 765 lb-ft of torque at 1,600 RPM. This powerful engine provides exceptional towing and hauling capabilities, making it an ideal choice for heavy-duty tasks.
The Duramax 12638502 engine features an advanced common rail direct injection system, which injects fuel directly into the cylinders under high pressure. This system improves combustion efficiency, reduces fuel consumption, and minimizes exhaust emissions. The engine also uses a variable geometry turbocharger, which allows for optimal boost pressure across a wide RPM range, further improving performance and fuel economy.
The Duramax 12638502 engine is built with durability in mind. It uses a cast iron block and aluminum cylinder heads, which provide excellent heat dissipation and resistance to engine wear. The engine also features a cast-iron crankshaft and forged connecting rods, which ensure robustness and reliability under heavy load conditions. The engine's oil cooling system, consisting of a large oil cooler and thermostatic oil bypass valve, helps maintain optimal operating temperatures, further extending the engine's lifespan.
In addition to its performance and durability, the Duramax 12638502 engine is also designed for ease of maintenance. It uses a single, common-size oil filter and a spin-on oil filter housing, which make oil changes quick and easy. The engine also features a dipstick-accessible oil filler cap, making it simple to check and add oil.
In summary, the Duramax 12638502 is a powerful, reliable, and efficient engine that is perfect for heavy-duty tasks. Its advanced features, such as common rail direct injection and variable geometry turbocharging, provide excellent performance and fuel economy. Its robust design, with a cast iron block and aluminum cylinder heads, ensures durability and longevity. And its ease of maintenance, with a single oil filter and spin-on oil filter housing, makes it simple to keep the engine running at its best.
Pros of buying a 2011-2015 Chevrolet/GMC Sierra 2500/3500 with a Duramax 6L LML engine:1. Powerful and Reliable Engine: The Duramax 6L LML engine is known for its durability and power, delivering up to 365 horsepower and 660 lb-ft of torque.
2. Towing Capacity: The Sierra 2500/3500 is capable of towing heavy loads, making it an excellent choice for those who need to tow trailers, boats, or heavy equipment.
3. Resale Value: Duramax-powered trucks have a strong resale value due to their reliability and popularity.
4. Availability of Parts: The Duramax engine is a common choice, which means that parts are readily available and comparatively cheaper than for less popular engines.
Cons of buying a 2011-2015 Chevrolet/GMC Sierra 2500/3500 with a Duramax 6L LML engine:1. Fuel Consumption: The Duramax engine is known for its fuel efficiency, but compared to newer models, it may consume more fuel, especially when towing heavy loads.
2. Maintenance Costs: While the Duramax engine is generally reliable, it does require regular maintenance, which can be costly. This includes tasks such as replacing the diesel particulate filter (DPF) and performing regular oil changes.
3. Emissions Regulations: Older models may not comply with current emissions regulations, which could make it difficult to register or operate the vehicle in certain areas.
Conclusion: The 2011-2015 Chevrolet/GMC Sierra 2500/3500 with a Duramax 6L LML engine is a reliable and powerful option, especially for those who need to tow heavy loads. However, potential buyers should consider the higher maintenance costs and potential emissions compliance issues. If these factors are not a concern, this truck could be an excellent investment, given its strong resale value and availability of parts.
Recommendation: If you are in the market for a used Duramax-powered truck, it is recommended to inspect the vehicle thoroughly, including checking the service history and ensuring that the emissions regulations in your area are met. Additionally, consider obtaining a pre-purchase inspection to identify any potential issues.
A replacement engine is dependent on our available inventory. Warranty coverage begins on the date of purchase sales documentation must accompany all claims. Engines will not be shipped out until paid in full
Any used engine, transmission, or differential will have a 3 month guarantee against mechanical product failure due to manufacturer defect. 2011 - 2015 Chevrolet GMC Sierra Silverado 2500 3500 Complete 6.6L Lml 12638502: 2011 - 2500HD 3500HD 6.6 L Duramax LML Engine Assembly 12638502 w/ Belt Driven Accessories, Turbo, Injectors, High Pressure Injection Pump, Adapter Plate, Flywheel/Flex Starter, Oil Pan, Wiring Harness, Intake Manifold, and Exhaust Manifold. It does not include shift control modules, switches, sensors, oil seals and gaskets will not be covered under warranty. Single one time repair and replacement or credit coverage ends when either both applicable claim types have been applied.
Schedule of covered internal lubricated moving parts including carrier case, gear sets, bearings, bushings,axle shafts, limited slip clutch pack and power divider. Maintenance and/or wearable items are not covered under warranty. Proudly specializing in 3/4 ton to heavy duty trucks. Credit applied upon review.