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2004.5-2005 Duramax 6.6 LLY

The 2nd generation of the Duramax Diesel engine was introduced half way through 2004.  This generation was named the LLY and lasted from 2004.5 to 2005.  It can be identified by the 8th digit of the vehicles VIN which should be 2. 

The injectors were upgraded from the previous LB7 version and are now serviceable without removing the valve covers.  An EGR emmisions system was introduced as well.  Horsepower was rated at 310 at 3,000 rpm.

Cold Air Intakes and Air FiltersFront and Rear BumpersProgrammers, Chips, and Power Modules


Cooling System ComponentsDifferential PartsEGR Valve and Cooler Parts

Engine PartsIndividual Parts, Tips, and ClampsComplete Exhaust Systems

Oil and Fuel FiltersFuel System UpgradesDash and Pillar Gauge Pods

Pyrometers, Boost, and Temp GaugesStock and Upgraded Fuel InjectorsStock and Upgraded Fuel Injection Pumps

Intercoolers, Boots, and PipingUpgraded Vehicle Specific LightingSuspension Upgrades

Transmission Upgrades and PartsStock Replacement Turbochargers