2019 GMC Sierra Denali and AT4 First Test: Two Steps Forward, One Step Back
There are two things GMC would very much like you to know about the new Sierra. The first it’s shouting from the rooftops: The Sierra is no longer a photocopy of the Chevrolet Silverado. The second it’s showing rather than telling: There’s a 2-inch lift and an “AT4” badge, which loosely translated from marketing-speak means […]
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