In December, UAW members voted for a direct-election system for union leaders, rather than the delegate system that many considered an enabler for corruption among the top ranks after a wide-ranging investigation sent two former presidents and 13 others to prison.
A federal judge approved the members' vote in February and ordered the union to implement the new voting system by June 30.
Dittes has been part of the UAW staff for 23 years. He became a UAW vice president in January 2018, replacing Norwood Jewell as head of the Fiat Chrysler Automobiles department. Jewell resigned because of his involvement in the corruption probe. He was sentenced to prison in 2019 for accepting bribes from FCA executives.
Dittes was appointed vice president of the GM department in July 2018.
The following year, the UAW selected GM as its target automaker for a new labor contract.
The contract was ratified in late October after more than 46,000 U.S. hourly workers staged a 40-day-long walkout. Under the ratified contract, GM could close three underutilized plants, and workers received a record $11,000 ratification bonus and as much as $32 in hourly wages. GM also agreed to spend $3 billion to retool Detroit-Hamtramck Assembly, now called Factory Zero, to build electric vehicles.