2019 GMC Sierra AT4 Sierra AT4 features new versions of the proven 6.2L and 5.3L V-8 engines along with all-new Duramax 3.0L inline-six turbo-diesel engine. The available 6.2L …
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2019 GMC Sierra AT4
2019 GMC Sierra AT4 The all-new 2019 Sierra AT4 was revealed in New York today. For the first time ever, the Sierra AT4 delivers a unique formula of authentic off-road capability and …
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