• A 2014 GMC Sierra pickup undergoes testing in the GM Aerodynamics testing. Time spent in the lab led to advancements in body design and sealing.
  • The 2014 GMC Sierra's new front air dam directs air out and around the truck's tires, benefitting the truck's aerodynamic efficiency.
  • A 2014 GMC Sierra pickup undergoes testing in the GM Aerodynamics testing. Time spent in the lab led to advancements in body design and sealing.