DETROIT — Union and company bargainers are making progress toward a new contract as a strike by United Auto Workers brought 33 General Motors factories to a halt continued into its third day.

Committees working on thorny issues such as wages, health insurance costs, use of temporary workers, and new work for plants slated to close worked until early evening Tuesday and are scheduled to resume bargaining early today.

UAW spokesman Brian Rothenberg said the talks were moving slowly but progressing.

More than 49,000 workers walked off their jobs on Monday in a dispute over the union’s quest to get a bigger share of GM’s profits and the company’s goal of cutting labor costs so they’re closer to those at U.S. auto plants run by foreign companies.

Health care costs and giving temporary workers a clear path to permanent jobs were two major sticking points in talks toward a new four-year contract.

On the picket lines, many workers were hoping for a quick resolution, but said they’re willing to stay out as long as needed.

“I can’t see this lasting too long,” said machinist Clarence Trinity as he carried a union sign at GM’s engine and transmission factory in the Detroit suburb of Romulus, Michigan. “Both sides are losing bad.”

Citi analyst Itay Michaeli, in a note to investors, estimated that the strike is costing the company $100 million per day in earnings.