April 24, 20206 yr Moderators The 2020 GMC Sierra 3500 HD Dualie boasted 6.6 liters of Duramax diesel power and two more tires in its rearend than usual in our test. See how this dualie fared on- and off-road in the 2020 Pickup Truck of the Year test. What’s Hot More than 30,000 pounds of towing capacity Downright surprising View the full article
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