All-New Duramax 6.6L Diesel Is Our Most Powerful Ever

Updates that General Motors is making to their GMC-branded Heavier-Duty Full-Size pickup trucks for the 2017 model year.

Introducing the updated 2017 GMC Sierra HD, available with our most powerful Duramax Diesel engine ever. Learn more about how this professional-grade pickup can make hard work even easier.

Source: All-New Duramax 6.6L Diesel Is Our Most Powerful Ever

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