Road Test: 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro
Clean Fleet Report
MARCH 30, 2021
Power and Torque and Fuel Sipping. Clean Fleet Report. 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.
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