United Auto Workers members voted Sunday to resume work at a General Motors Corp. assembly plant while studying a tentative accord to end a 7-week-old strike.

Some skilled trades workers and maintenance crews planned to return to work Sunday night, and all three maintenance shifts would be on the job today, said Steve Featherston, president of UAW Local 1999.

The rest of the 3,500 striking workers will return to work Tuesday, he said.

About 70 percent of the 1,450 workers meeting Sunday voted to return to work, union officials said.

Employees struck the plant, which produces the Oldsmobile Cutlass and the Chevrolet Malibu, on April 4 after failing to come to terms with the nation’s biggest automaker on staffing, safety and health.