"Wind drag" refers to the resistance or force experienced by an object moving through the air. It is the effect caused by air pushing against the object, slowing it down and making it harder to move through the wind. Full definition
A new side profile also works to enhance aerodynamics, while an integrated spoiler at the rear of cab works to direct air onto the tailgate lip to reduce wind drag from the bed. (fourwheeler.com)
The powerful side profile further enhances aerodynamics, including an integrated spoiler at the rear edge of the cab that directs air onto the tailgate lip, reducing wind drag from the bed. (gm.com)
These would include ground - effect packages, rear deck spoilers, and other components that increase wind drag. (drive-safely.net)