While the second LLY iteration of the Duramax was a step up, the third generation LBZ Duramax — released in 2006 — was the engine that put the Duramax ahead of the competition. In many ways ...

Read more: How To Clean Your Car's Engine Bay: A Step-By-Step Guide Introduced in 2006 to replace the LLY Duramax engine, the LBZ, which could produce up to 360 hp and 650 lb-ft of torque ...

The Duramax 6.6-liter turbocharged diesel engine is radically upgraded for 2006. On available GMC Sierra models, an LBZ version of the 6.6-liter Duramax diesel is offered with a 650 pound-feet of ...