6.6L LLY Diesel Engine

Looking for a reliable and powerful engine for your diesel truck? The LLY Duramax engine is a top choice for many drivers. Introduced in the 2004 model year, this V8 engine boasts impressive features that enhance performance and drivability.

  • Improved Emissions: The LLY Duramax is equipped with advanced emissions control technology, reducing pollutants while delivering accessible torque.
  • High Performance: With 310 horsepower and an overhead valve configuration, the Duramax LLY offers substantial power. It’s capable of achieving the highest additional horsepower from tuning among Duramax engines.
  • Durability Upgrades: Key improvements include an EDM oil pump shaft with a hardened dowel and enhanced gasket sealing in common leak areas, ensuring long-lasting reliability.

If you’re searching for an LLY Duramax for sale, explore our selection to find the perfect fit for your truck. Boost your vehicle’s performance with an LLY Duramax engine today!

The DFC Difference

DFC Diesel Rebuilders prides itself in being the highest quality product on the market. This is why we can back our engines with a 5 year 160,000km warranty that we stand behind.

Our engines have been re-manufactured to factory specs using all new industry recognized name brand parts that meet and exceed OEM specifications. The block has been professionally machined and bored for use with the next over-sized piston NO SLEEVES ARE USED.

All New OEM or equivalent pistons, rings, and gaskets are used to ensure quality and consistency of our engines. Our Re-manufactured Cylinder Heads have all new seats, guides, valves, and stem seals as well as being resurfaced and magnafluxed.

What to expect from a DFC 6.6L LLY Diesel Engine

Short Block Engines include:

  • Front Cover with Seal
  • Rear Cover with main seal
  • Oil pan
  • All internal components
  • Complete gasket kit for installation
Long Block Engine Include:
  • Complete short block assembly and gaskets, plus cylinder head
  • All rockers/pushrods preset to factory specifications
  • Complete top end gasket set to finish installation.



All remanufactured engines are serviced with Rottler CNC machining, which guarantees high quality results.

To learn more about Rottler’s innovative, industry leading machines please visit: www.rottlermfg.com

Brand: Chev-GMC Duramax

Product Type: Engines

Years: 2004.5 - 2005