GMC Sierra AT4 Truck

The redesigned 2019 Sierra was just introduced, and GMC is already upping the offroad capabilities of the new truck with the AT4 package. The AT4 builds on the SLT trim level, with a blacked-out exterior, exclusive wheels, and a two-inch lift from Rancho shocks. The interior has headrests embroidered with the AT4 logo and a head-up display and rearview camera are options. The AT4 is expected in dealers this fall, with the AT4 package spreading to the rest of GMC's lineup over the next two years.

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