2020 GMC Sierra AT4 Diesel Off Road Course
1:48
YouTubeThe Awesomer
2020 GMC Sierra AT4 Diesel Off Road Course
We spent some time with the GMC team checking out their newest trucks, including the rugged Sierra 1500 AT4 pickup truck, putting it through its paces on an off-road dirt and rock course outside in Alpine, Wyoming. For 2020, the Sierra 1500 AT4 is available with a 3.0 liter Duramax Diesel engine, which makes 277 hp and 460 lb-ft of torque, and ...
40.8K viewsAug 30, 2019
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