April 29, 20206 yr Moderators The 2020 GMC Sierra 2500 HD AT4 combined an off-road package with an already ironclad heavy-duty platform, and we made sure to flog the truck on the dirt and the tarmac. Read on to see how the HD fared on- and off-road in the 2020 Pickup Truck of the Year test. What’s Hot “Irresponsible” amount View the full article
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