The two auto makers are expected to sign an agreement Wednesday that would give them the same share of maintenance and repairs work, Axios reported.
The deal is expected to save Ford $3 billion a year and GM $1 billion a month.
The agreement, which will be the first major U.S. pact to contain the auto industry, would make the companies joint responsibility for a majority of work on vehicles they produce, according to Axios.
It’s unclear if Ford and GM will be able to negotiate the agreement in advance.
Ford already has agreements with the two companies for maintenance work and repairs on cars and trucks.
Ford’s agreement with GM could be worth about $1.5 billion a decade.
General Motors is the only other automaker that will not have a joint responsibility.
Ford has already announced it would no longer participate in joint projects.
The automaker said it will work with GM on “critical maintenance” of its vehicles and has announced it will spend $3.5 million to buy new vehicles, a move that was expected to cut costs.