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Many configuration possibilities; high towing capacity; optional dual-rear wheel setup; available luxury options
The GMC Sierra HD trucks get a new engine for 2017: a revised 6.6L Turbo Diesel V8. Though it shares its size and configuration with the previous powerplant, the new engine makes more than 40 additional horses and well over 100 lb-ft more torque than the engine it replaces. Other new features for 2017 include new wheels for trucks equipped with the Terrain X HD package, new optional 20-inch wheels on the SLT trim and a couple of new colors: Dark Slate Metallic and Pepperdust Metallic.
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