The 6.6L Duramax in the 2006 GMC Sierra 2500HD SLT is a turbo-diesel V8 engine known for its strong power and torque. It produces 360 horsepower and a massive 650 lb-ft of torque, making it ideal for heavy towing and hauling. This engine delivers excellent low-end torque, which helps in pulling heavy loads and off-road performance. It pairs with a robust Allison automatic transmission designed to handle the engine’s power and provide smooth shifts. The Duramax diesel is prized for its durability, fuel efficiency relative to its size, and reliability, making the 2006 Sierra 2500HD with this engine a popular choice for work trucks that need serious capability and longevity.
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