We take a look at the just unveiled 2015 GMC Yukon Denali and Yukon XL, and drive the Sierra Denali with the new Ecotec3 6.2-liter engine.
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The 2014 Chevrolet Silverado 1500 and GMC Sierra 1500 will be the most powerful trucks on the road, when a new V-8 engine debuts this fall.
GM's new trucks earn five stars in crash evaluations, beating out key rivals.
Once upon a time, St.