DETROIT (AP) - United Auto Workers leaders have approved a proposed contract with General Motors Co.

DETROIT (AP) United Auto Workers leaders have approved a proposed contract with General Motors Co.

Workers at GM's 63 U.S. facilities must now vote on the agreement for it to take effect. The four-year contract covers 52,600 GM factory workers.

Like a previous agreement reached with Fiat Chrysler workers, GM's agreement would eliminate a two-tier wage system over eight years. GM currently pays recent hires less than longtime workers.

The agreement also would give longtime workers their first raises in nearly a decade. It would give both tiers of workers an $8,000 signing bonus if they ratify the contract.

The UAW and GM reached the proposed agreement Sunday night just before a deadline the union had set to strike.

Fiat Chrysler's workers approved their agreement last week.