Road Test: 2021 GMC Sierra 1500 Duramax 4WD Crew Cab AT4 CarbonPro
Clean Fleet Report
MARCH 30, 2021
The electric-assisted steering had good road feel with responsiveness and little body roll in most cornering situations. The dash has controls for 2WD, 4WD and Auto 4WD. Our Sierra AT4 also was equipped with the trailering package that included a trailer brake controller, jackknife alert and trailer electrical hook-ups.
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