Mudding, Towing & Hauling Payload in the GMC Sierra AT4 + Torture Testing a CarbonPro Bed!

We put the 2020 GMC Sierra AT4 through our lineup of tests to see how it stacks up. We try and go in-depth here on Truck King, but that can make the videos a little long. Here's a quick way to access the section you might want to watch. Video glossary: Walkaround - 1:06 In-Depth Look at CarbonPro - 2:22 Sierra AT4 Pricing - 4:16 CarbonPro Easter Egg - 6:07 Payload test - 10:27 Towing test - 15:32 Off-Road test - 22:28 #GMC #Sierra #Trucks