2001 – 2004 6.6L Duramax LB7

The 6.6L Duramax LB7 diesel engine that can be found in the 2001-2004 Chevrolet Silverado HD and GMC Sierra HD. It was also used in the Chevrolet Kodiak and GMC Topkick, which were medium-duty trucks produced until 2009. The LB7 was introduced in 2001 and used until early 2004 before it was replaced with the LLY Duramax.
The LB7 6.6L Duramax was capable of producing 300 horsepower at 3,100 RPM and 520lb-ft of torque at 1,800 RPM.