Road Test: 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro
Clean Fleet Report
MARCH 30, 2021
Clean Fleet Report. Fuel economy numbers reported by Clean Fleet Report are non-scientific and represent the reviewer’s driving experience using the dash gauge computer. Clean Fleet Report. Clean Fleet Report’s Sierra AT4 had an attractive two-tone interior of Jet Black with Kalahari accents. Clean Fleet Report.
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