GMC test drives employees with hidden camera setup

GMC's cadre of automotive service agents stunned by three crazy contraptions

As the name implies, GMC's automotive service program "Only for GMC" only serves the Detroit automaker's own vehicles.

To show the professionalism of employees even when dealing with non-GMC vehicles, Leo Burnett Detroit installed several hidden cameras in a garage.

Then a vehicle with tank treads, a hovercraft and even a man wearing a jetpack show up. The employees do all they can for the vehicle owners, but as one serviceman admits, "It doesn't even have tires" (pointing the hovercraft).

The ad ends with, "Professional-grade care ... But please, only for GMC."