Engine Components for 2004.5-2005 6.6L LLY Duramax
Producing 310 horsepower and 520 pounds-feet of torque, GM’s 6.6-liter Duramax LLY engine isn’t immune to engine woes, especially overheating.
The LLY Duramax is prone to head gasket failure due to an insufficient cooling system and large Garrett VVT turbocharger. Symptoms of a bad head gasket include white smoke, overheating, and a loss of coolant. +Read more
In addition, the LLY is susceptible to a defective exhaust gas recirculation system. The EGR system reintroduces exhaust gasses into the engine, lowering emissions. Soot and carbon can build up and cause the EGR system’s components to fail, requiring replacement LLY parts.
ProSource Diesel has all of the LLY Duramax parts you need to keep your truck on the road.