Not sure if it’s just an intentional leak or just an honest mistake, but in an article boasting the aerodynamic efficiency of their designs, GMC revealed the first official pictures of the 2014 Sierra Regular Cab pickup truck.

They don’t reveal much about the truck, and talk mostly about aerodynamics and how the 2014 Sierra will be the most fuel-efficient V-8 pickup on the market thanks to its clever design.

For instance, it has a front bumper that reduces the brag by directing air toward the ground and away from the truck’s rough underbody. It also features ducted flow path between the grille and radiator prevents air from swirling inside the truck’s front cavities. Around at the back, Sierra’s tailgate and the center high-mounted stop light are optimized to guide air cleanly around the truck.

Official details of the truck itself are expected to be released soon.