6.6 Duramax Engine Price range: $3,000.00 through $13,000.00Select options
6.6 Duramax Engine
The 6.6L Duramax V8 turbo-diesel is a powerful and durable engine known for its high torque, strong towing capability, and long-standing presence in heavy-duty applications. The current version produces 470 horsepower and 975 lb-ft of torque, combining robust construction with modern diesel technology. Designed to operate on ultra-low-sulfur diesel or B20 biodiesel, the 6.6L Duramax combines a strong underlying architecture with modern turbocharging and fuel-system technology, making it a capable choice for heavy-duty trucks and other demanding applications.
In Stock
$3,000.00 – $13,000.00Price range: $3,000.00 through $13,000.00
The prices are exclusive of taxes and shipping. The price may vary depending upon the miles and year of manufacturing.
SKU: GM-66DMX
Category: Used Engine
Tags: 6.6 Duramax Diesel Engine, 6.6 Duramax Engine, 6.6L Duramax Engine, 6.6L V8 Diesel Engine, Chevrolet 6.6 Duramax Engine, Chevy 6.6 Duramax Engine, Duramax Diesel Engine, Duramax V8 Engine, GM 6.6 Duramax Engine, GMC 6.6 Duramax Engine, OEM 6.6 Duramax Engine, Used 6.6 Duramax Engine
Brand: General Motors
Additional Information
| Brand | General Motors |
|---|---|
| Conditions | Remanufactured, Used |
| Miles | 70000-130000 |
| Year Compatibility | 2001-2025 |
| Verified | Tried & Tested |
| Warranty | Up to 3 Months |
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Specifications
The 6.6 Duramax Engine is a V8 turbo-diesel heavy-duty engine that has evolved through multiple generations since its introduction in 2001, with continuous improvements in power, efficiency, emissions performance, and durability. The latest version delivers 470 horsepower at 2,800 RPM and 975 lb-ft of torque at 1,600 RPM, providing the substantial low-end pulling power required for demanding towing and hauling applications. The engine uses a 6.6-liter (402-cubic-inch) V8 configuration, with a cast-iron block, aluminium cylinder heads, and a 4.055-inch bore × 3.897-inch stroke. It has a 1-2-7-8-4-5-6-3 firing order and weighs approximately 835 lb (379 kg) dry.
Engine Variants
LB7 Duramax (2001–2004)
The LB7 Duramax was the first-generation 6.6L Duramax V8 turbo-diesel, introduced in 2001. It features a 6.6-liter (402 cu. in.) V8 configuration, cast-iron block, aluminum cylinder heads, and Bosch high-pressure common-rail fuel injection. With a 4.055-inch bore and 3.897-inch stroke, the LB7 established the Duramax platform with strong torque, reliable performance, and improved fuel-injection technology for heavy-duty applications.
LML Duramax (2011–2016)
The LML Duramax generation uses the 6.6-liter V8 architecture with a cast-iron block, aluminum cylinder heads, and Bosch common-rail fuel injection with a CP4.2 high-pressure fuel pump. The LML duramax also incorporated selective catalytic reduction (SCR) with diesel exhaust fluid (DEF), along with advanced emissions-control systems, making it a more refined and cleaner-performing Duramax engine.
L5P Duramax (2017–Present)
The L5P Duramax is the modern-generation 6.6L Duramax V8 turbo-diesel, engineered for increased durability, towing capability, and performance. It features a 6.6-liter (402 cu. in.) displacement, 4.055-inch bore, 3.897-inch stroke, cast-iron block, aluminum cylinder heads, and advanced common-rail fuel injection. The latest version produces up to 470 horsepower at 2,800 rpm and 975 lb-ft of torque at 1,600 rpm, providing substantial low-end pulling power for heavy-duty towing and hauling applications.
LLY Duramax (2004–2005)
The LLY Duramax was the second-generation 6.6L Duramax V8 turbo-diesel, introduced in 2004 as a successor to the LB7. Featuring a 6.6-liter V8 architecture with a cast-iron block and aluminum cylinder heads, while introducing electronically controlled variable-geometry turbocharging and revised common-rail fuel injection. The LLY offers improved emissions controls and engine cooling, delivering stronger performance and better emissions compliance for heavy-duty towing applications.
LMM Duramax (2007–2010)
The LMM Duramax was introduced in 2007 as an updated 6.6L Duramax V8, building on the LLY platform with improved emissions performance, durability, and power delivery. It used common-rail fuel injection, a variable-geometry turbocharger, and a diesel particulate filter (DPF) to meet stricter emissions standards. The LMM produced up to 365 horsepower and 660 lb-ft of torque, providing strong towing and hauling capability while offering cleaner operation than earlier Duramax generations.
Frequently Asked Questions
Which is better, the 6.6 Duramax engine or the 6.7 Cummins?
Both engines are very good. The 6.7 Cummins is better suited for heavy-duty work and long-term use, while the 6.6 Duramax engine is smoother and more comfortable for everyday driving.
What year of the 6.6 Duramax engine should you avoid?
The 2001–2004 LB7, 2004.5–2005 LLY, and early 2011–2012 LML models should be checked carefully because they can have some common reliability problems.
Which original components may need to be transferred to a replacement 6.6 Duramax Engine?
Depending on the application, components such as the alternator, starter, turbocharger, intake and exhaust parts, sensors, wiring harnesses, fuel-system components, brackets, and other accessories may need to be transferred from the original engine. Compatibility should be confirmed before installation.
What vehicles use the 6.6 Duramax engine?
The 6.6 Duramax engine is mainly used in heavy-duty Chevrolet Silverado HD and GMC Sierra HD trucks, along with some commercial vehicles.
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