Pros: Powerful diesel V-8 Slick-shifting 10-speed Clever trailering cameras Cons: Half-assed gas V-8 Cheap, unsightly interior Soft, squishy brakes Think carefully before you check the option boxes—otherwise your GMC Sierra HD could be a dud. We sampled the gas and diesel engines at Truck of the Year, and although one was good and the other […]

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