Graphic courtesy of American University.

Graphic courtesy of American University.

A trio of General Motors mid-size SUVs has been named the most American vehicles of 2017 by American University's Frank DuBois, who releases his index every year.

This year, the Chevrolet Traverse, GMC Acadia, and Buick Enclave, which are all built on the same platform and assembled in Michigan, as the most American vehicles.

The 2017 Kogod Made in America Index evaluates what percentage of a vehicle's value contributes to the overall well-being of the U.S. economy by analyzing seven criteria, including profit margin, labor, research and development, inventory, engine, transmission, and body, chassis and electrical components.

For full details about the index, visit the university's website here.