Exhibit 99.1

Wednesday, Dec. 13, 2017

GM Announces Joe Ashton Resigns

From Board of Directors

DETROIT — General Motors Co. announced today that Joe Ashton has elected to resign from GM’s Board of Directors. Ashton joined GM’s board in August 2014, and was designated to the board by the VEBA Trust.

Prior to joining the GM board, Ashton was a member of the UAW International staff from 1986 to 2014. He was also active in labor and civic affairs during his career, including previously serving as Executive Vice President of the Pennsylvania AFL-CIO Executive Council and Executive Vice President of the New Jersey AFL-CIO.

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CONTACT:

Pat Morrissey

GM Corporate Communications

313-407-4548

patrick.e.morrissey@gm.com