United Auto Workers union members at the General Motors plant in Spring Hill have narrowly rejected a tentative national agreement for a new contract. Workers have been on strike for more than a month.

The vote was 1,673 against the deal and 1,666 in favor. The ratification of the deal will be determined by the total UAW membership around the country. Voting is expected to be completed by Friday.

GM plants in Spring Hill and Lansing, Mich., would be in line to make a next generation midsize SUV under the deal. Making the new vehicle is projected to cost $1 billion and create 5,000 jobs.

UAW-covered workers would receive a $11,000 signing bonus upon ratification of the contract, while temporary workers would get $4,500.

Workers would receive 4% lump sum payments in the first and third years of the contract, and 3% wage hikes in the second and fourth years. The agreement also envisions an accelerated path for temporary workers to become employees.