TOLEDO, OH—General Motors Co. plans to add more than 650,000 square feet to its Alexis Road transmission assembly plant here.

SPRING HILL, TN—General Motors has broken ground on an expansion of its engine assembly plant here, as a part of a $788 million investment the company announced in April.

OSHAWA, ON—Canadian auto workers union Unifor has a tentative contract agreement with General Motors Co. that not only breathes new life into the at-risk Oshawa Assembly Plant east of Toronto, but signifies a testament to the importance of the automotive industry across Canada.

TORONTO—Unifor has selected General Motors as the company with which it will set a pattern for negotiating new labor contracts with the Detroit Three automakers. The Canadian union’s current contracts with the companies expire Sept. 19.

ORION, MI—GM’s assembly plant here saves $1 million annually by using renewable energy sources and now ranks as the 8th largest user of “green power” in the United States.

TORONTO—A day after Unifor President Jerry Dias issued scathing remarks about General Motors Co., the Canadian auto workers union president praised bargaining teams at Ford Motor Co. and Fiat Chrysler Automobiles during the official opening to their labor negotiations.

BOWLING GREEN, KY—General Motors Corp. will invest $290 million in its Corvette assembly plant here to fund a series of upgrades at the facility.

FLINT, MI—GM plans to move some production of light-duty pickups next year from Silao, Mexico, to its assembly plant here.