The United Automobile Workers union reached a tentative agreement on Saturday on a new labor contract with Fiat Chrysler, the last of the three Detroit automakers at the bargaining table.

The union’s national council will meet on Dec. 4 to approve the contract before it is put to a ratification vote by the 47,000 union members.

The tentative contract calls for each of Fiat Chrysler’s factory workers to get a $9,000 bonus if the deal is ratified, the same bonus Ford Motor Company agreed to earlier this month.

The union said the four-year agreement calls for Fiat Chrysler to invest $4.5 billion in plants in the United States. Including previously announced investments, the company now intends to spend $9 billion on plant upgrades and expansions over the next four years