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*Based on model year EPA mileage ratings. Use for comparison purposes only. Your atual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid only) and other factors.VIEW OUR INVENTORY
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.