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Welcome to Remane Diesel Engine
US Engine Production has been a trusted provider of new and remanufactured high quality engines at competitive prices for over 35 years. Our production facility is 180,000 square feet and located in Vassar Michigan, with corporate operations in Plainview New York. USEP produces over 5500 diesel and gas engines each year in all makes and sizes and inventories approximately 1200 units. We offer a flexible core return policy, that allows up to 30 days to return your core and we pay the return freight. Many units require no up-front fee and have an average lead time of 3 – 5 business days. We also offer transmissions, parts and accessories such as fuel injectors, fuel pumps, water pumps and turbochargers. We believe that lasting business relationships are based on mutual trust and respect, and that customer service is of the utmost importance. Our workplace core values demand that our employees conduct themselves with integrity, accountability, diligence and discipline. Given the opportunity, you will find us to be a trustworthy partner.

Duramax 6.6L LLY Remanufactured Long Block

*Detailed engine photos are available upon request*


One-Year Unlimited Mileage Warranty!

The average lead-time is between 1 and 3 days


Core Charge policy:

There is no core charge providing you call and schedule your existing core to be picked up within 30 days of the purchase day and US Engine Production receives it no later than 60 days after purchase date. US Engine will pay the return shipping of your existing core.

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Availability: In stock

SKU: duramaxllylb

  • Description
  • Additional Info
  • Reviews

Our Long Block Engine Includes:

·        Cam/Main/Rod Bearings

·        Oil Pump

·        Timing Gears

·        Camshaft

·        Pistons

·        Valves

·        Connecting Rods

·        Piston Rings

·        Valve Guides

·        Gaskets

·        Push Rods

·        Valve Keepers

·        Lifters

·        Rocker Arms

·        Valve Springs


Call us today with any questions and to verify this engine will work for you:



Additional Information Includes New OEM Spec Parts: Cam/Main/Rod Bearings, Oil Pump, Timing Gears, Camshaft, Pistons, Valves, Connecting Rods, Piston Rings, Valve Guides, Gaskets, Push Rods, Valve Keepers, Lifters, Rocker Arms, Valve Springs.
SKU duramaxllylb
Brand GM
condition Refurbished

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