
31 photos
2021 GMC Sierra 2500 HD Crew Cab
AT4 Pickup 4D 6 1/2 ft88,877 miles
Why You’ll Love This Sierra 2500
Slotted above the SLT and below the Denali in the Sierra 2500 HD lineup, the AT4 elevates everyday usability with the six-function GMC MultiPro Tailgate, enhances adventure with AT4 off-road capability and an automatic locking rear differential, and adds comfort with heated and ventilated front bucket seats.
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