The LLY Duramax is a 6.6L V8 diesel engine produced by General Motors from mid-2004 to early 2006. It was primarily used in the Chevrolet Silverado/GMC Sierra 2500HD/3500 trucks and also appeared in the 2006 Hummer H1 Alpha. The LLY was the first Duramax to feature a variable geometry turbocharger and an EGR system to meet emissions standards. This one needed some new head gaskets. We also installed some head studs for peace of mind and longevity. | TSTQ Automotive Services
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