The GMC Sierra HD AT4X is spotted looking powerful and large.

As it speeds along the highway, the GMC Sierra HD AT4X is unmistakable.

This full-size pickup truck has a powerful appearance thanks to its hefty body and black grille.

The truck's many functions may go unnoticed by onlookers due to its rugged design.

An stunning 12-inch touchscreen display provides a world of entertainment at drivers' fingertips,

while air suspension keeps them comfortable on the trip.

With an updated trailering kit and cutting-edge cameras,