General Motors of Canada resumed production at two assembly plants late on Tuesday after workers at a key supplier accepted a new contract and returned to work.

Reuters noted that Canada's biggest automaker was forced to idle the major assembly plants in Oshawa, Ontario, on Monday because of parts shortage, after TDS Automotive workers went on strike on Sunday night in a wage dispute.

GM spokeswoman Pam McLaughlin reportedly said the third shift would be called back to work later on Tuesday night, after TDS employees voted to accept the new contract.

The GM plants make the Chevrolet Impala and Monte Carlo models as well as the Buick Regal and Pontiac Grand Prix, and normally produce 2,630 vehicles a day, a GM spokeswoman told Reuters, adding that the shift cancellations affected about 6,000 employees.

"We have the opportunity to run an overtime on a weekend, or fit in some extra time to the week (to catch up on lost production)," she reportedly said.

TDS makes just-in-time deliveries to GM of subassembly components for steering columns, among other parts, Reuters noted.

Canadian Auto Workers union spokesman Hemi Mitic reportedly said TDS workers voted 85% in favour of the deal.

Reuters said the CAW represents the roughly 550 TDS workers who accepted a three-year contract that offers higher wages and an adjusted shift premium.