General Motors’ LBZ Duramax Engine is one of the most reliable engines ever built. Over the years, the LBZ and other Duramax engines have carved out a reputation for durability, reliability, and long service lives. The LBZ Duramax engine was only produced in 2006 and 2007, but in what may be a testament to its longevity, many are still on the road and are highly sought after by enthusiasts. Still, nothing’s perfect, and even the best engines will have
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