Road Test: 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro
Clean Fleet Report
MARCH 30, 2021
But maybe since the predominant vehicles on the road these days are midsize to large SUVs, a big truck really isn’t so big. mpg, but on a 100-mile all-freeway run with the adaptive cruise control set at 65 mph, we got an impressive 29.8 I heard how nice it looked, how it wasn’t overly garish and, while big, it wasn’t too big.
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