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2008 GM Duramax LMM 6.6L Diesel Engine

2008 Duramax 6.6L Diesel Engine

Used Engines Inventory

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Diesel Engines Inventory

LMM long block for GM HD trucks

The 2012 Ford Powerstroke 6.7L Diesel Engine is a robust choice for heavy-duty applications, found in the 2012 Ford F250, F350, and F550 models. This turbocharged V8 engine delivers significant torque and horsepower, making it ideal for towing and hauling. Its design ensures both performance and efficiency, with a reputation for reliability and durability. Whether for work or recreation, the 6.7L Powerstroke handles demanding tasks with ease. For more details on its performance and specs, visit our 2012 F250 diesel engine page.

Diesel Engine

LMM long block for GM HD trucks

The 2008 Duramax 6.6L engine delivers strong towing power and dependable operation for Silverado 2500 diesel engine and Sierra 3500 diesel applications. Built under the LMM generation, it features improved emissions performance without sacrificing torque. Houston Engines supplies both reman Duramax 6.6 and used Duramax 6.6 for sale, each thoroughly tested and inspected. The LMM long block is pressure-tested, balanced, and verified for coolant and oil flow integrity. For GM truck owners seeking Duramax reliability, these remanufactured engine options restore original torque and performance backed by warranty and precision machining.

The Duramax 6.6L diesel engine from Houston Engines undergoes a thorough inspection process to guarantee clean oiling, stable compression, and a smooth idle. Each used engine is carefully compression-tested to verify its mechanical integrity and ensure reliable performance.

This detailed evaluation identifies any potential issues before shipment, giving customers confidence in the quality and durability of their engine. Whether for fleet applications or daily driving, Houston Engines prioritizes precision and dependability in every unit.

Remanufactured Duramax 6.6L engines feature new pistons, bearings, and gaskets installed to OE specifications, providing long-term reliability and factory-level performance. Each LMM long block is built for precise fitment and consistent operation, supporting both heavy-duty fleet performance and everyday driving needs. With Houston Engines’ focus on quality and meticulous assembly, every Duramax 6.6L engine delivers trusted Ford diesel power, dependable service, and lasting durability for years of trouble-free operation.

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Are you in the market for a used engine to get your vehicle back up and running? Look no further than Houston Engines. We offer a wide selection of high-quality, used engines at affordable prices. We pride ourselves on our commitment to customer satisfaction and provide a hassle-free shopping experience for all our clients.

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Testing standards and warranty coverage

All 2008 Duramax 6.6L engines are compression-verified, with hot-run or simulation testing performed when possible. Test results are logged under each engine’s serial number, ensuring full traceability and quality assurance.

Used Duramax 6.6L engines come with limited parts coverage, while remanufactured versions include extended Duramax warranty protection. Backed by Houston Engines, every engine is verified for performance, reliability, and durability, providing peace of mind for both daily drivers and heavy-duty applications.

Carefully following break-in and installation steps is essential to maintain warranty coverage and ensure long-term Duramax 6.6L engine reliability. Begin by priming the lubrication system and using break-in oil to protect new internal components during the initial operation.

Early oil and filter changes are critical, along with replacing thermostats and flushing the cooling system to maintain proper temperature control and prevent overheating. These steps help protect the engine from premature wear and support consistent performance.

Additionally, inspect the turbo, intercooler, and EGR components to prevent contamination, leaks, or blockages that could compromise engine operation. Proper setup and maintenance safeguard new diesel engine parts, ensuring smooth operation and extending component life. By adhering to Houston Engines’ recommended procedures, your Duramax 6.6L will deliver dependable Ford diesel power, consistent performance, and lasting reliability for both daily driving and heavy-duty applications.

Compatibility, fitment, and install guidance

This remanufactured engine is designed for 2008 GM Silverado 2500HD and Sierra 3500HD trucks with the LMM long block configuration. Always confirm VIN, RPO code (LMM), emissions family, and production date to ensure proper LMM fitment.

Most brackets, sensors, and manifolds from your original engine will transfer easily during installation. This compatibility simplifies setup, ensures a precise fit, and helps maintain reliable performance in your GM Silverado or Sierra with the LMM Duramax engine.

If your vehicle has variant emissions equipment, Houston Engines can verify the correct casting and crank configuration for a seamless install. You can contact us anytime for torque specs, installation sheets, or freight timing details, ensuring a smooth replacement process. This support helps maintain proper fitment, reliable performance, and trusted Duramax or Powerstroke engine operation.

Freight handling and core return steps

All Duramax 6.6L diesel engines ship palletized and fully protected, with nationwide Duramax shipping available. Lift-gate and dock delivery options help minimize handling risks and ensure your engine arrives safely, whether at a home or commercial location. Houston Engines takes every precaution to protect your investment during transit.

Before returning a core, drain all fluids, cap openings, and secure the unit in the original crate. Include the provided BOL and RMA, and schedule pickup promptly after installation to avoid storage or rehandling delays. Proper preparation ensures a smooth return process and protects the integrity of the core.

Once inspected, core refunds are processed quickly. Units missing major components or showing damage may receive partial credit. Following Houston Engines’ core checklist guarantees maximum value, efficient processing, and seamless credit for returned Duramax 6.6L diesel engines.

Frequently Asked Questions (FAQs)

Frequently Asked Questions (FAQ)

What trucks use the 2008 Duramax 6.6L engine?

It fits 2008 Silverado 2500HD and Sierra 3500HD models equipped with the LMM Duramax 6.6L diesel.

Are both used and reman Duramax 6.6 engines available?

Yes. Houston Engines offers reman Duramax 6.6 and used Duramax 6.6 for sale options tested and backed by warranty.

How reliable is the 2008 Duramax 6.6L?

The Duramax 6.6L engine is known for strong torque, fuel efficiency, and excellent Duramax reliability when properly maintained.

What is an LMM long block?

It’s a fully assembled base engine including block, heads, crankshaft, pistons, and camshaft—ready for accessory transfer.

Do you offer warranty coverage?

Yes. Reman Duramax 6.6 units include extended warranty; used options feature limited Duramax warranty coverage.

How does Duramax shipping work?

Engines ship on protected pallets nationwide, with tracking and lift-gate options through Houston Engines.

What installation steps ensure reliability?

Follow GM break-in procedures, replace filters, and flush the cooling and fuel systems before startup.

Can I reuse my turbo and manifolds?

Yes. Most external components from your original engine transfer to the replacement remanufactured engine.

How do I confirm fitment for my truck?

Provide VIN and RPO code to confirm LMM fitment before ordering your diesel engine replacement.

How can I place an order?

You can contact us directly at Houston Engines for current pricing, freight options, and warranty registration details.

Why Buy From Us?

We strive to be the ultimate destination for recycled auto parts. With access to a vast inventory and exclusive parts network, we offer millions of quality parts. We specialize in used engines and transmissions with new stock weekly. Our commitment to quality means that you can trust that you're getting the best possible part for your vehicle.