The union representing about 23,000 workers at the Detroit Three automakers in Canada will target the company with the best investment plans as it tries to stem dwindling production north of the border.

Unifor will choose among General Motors Co., Ford Motor Co., or Fiat Chrysler Automobiles NV in labor negotiations starting Wednesday with the aim of reaching a deal for the remaining carmakers to mimic in a process known as pattern bargaining. While the United Auto Workers typically picks the strongest company first to reap better wages and benefits, Unifor President Jerry Dias said he’s looking for only one thing.

“It’s plain and simple,” Dias said in an interview at Bloomberg’s Toronto office. “Without investment and new products for our plants, there is no future for the Canadian auto manufacturing industry. We’ll negotiate with whoever can guarantee that.”

The union will select a target company in early September after considering proposals from the automakers this month, it said in a statement Monday.

The negotiations come as major automakers have taken production to countries such as Mexico in recent years, where lower labor costs and access to other trade agreements make for an attractive manufacturing hub. Canada has been hit particularly hard by the shift, despite near-record North American auto sales and a weaker Canadian dollar that should boost the nation’s competitiveness.

Canada auto output fell to 13% of North America production last year from about 17% in 2009 while output in Mexico has risen to about 20%, according to data from Ward’s Automotive Yearbook. Canada lost more than 53,000 automotive jobs from 2001 to 2014, according to a study by the Automotive Policy Research Centre.

The negotiations cover contracts at GM’s Oshawa assembly plant, Ford’s Windsor engine factories and Chrysler’s Brampton assembly plant, all in Ontario, which expire on Sept. 19. Those facilities are the focus of the talks, as GM’s Oshawa plant plans to shutter one of its two production lines next year, trimming 1,000 jobs, and doesn’t have new vehicles scheduled past 2019. Ford’s Windsor factories are also running on borrowed time after losing out to Mexico on a new engine program that would have created 1,000 jobs, Dias said.

“There is no doubt in my mind that GM plans on closing its Oshawa plant and we won’t let that happen,” Dias said. “Our feet are set in concrete. We need to know we are getting new products for our plants.” The union is prepared to strike if the two sides can’t reach an agreement in the talks, he said in an interview with Bloomberg TV Canada.

While Unifor is asking for new-product mandates before leaving the table, GM Canada President Stephen Carlisle has repeatedly stated that the company will not commit to anything until the negotiations are finished.

“One key milestone is that we must complete our 2016 union contract negotiations before we can make any final decisions,” Carlisle said in a statement last year. A spokesman for the company declined to comment further.