Road Test: 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro
Clean Fleet Report
MARCH 30, 2021
This means that when you are towing up a grade, it will pull strong and still deliver good fuel economy. These numbers are a bit lower than competitor trucks, but the trade-off is better fuel economy in exchange for less payload and towing. Fuel economy for the 3.0-liter Pricing and Warranties.
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