FREMONT, Calif. — Workers have expressed grave disappointment in General Motors Co. and Toyota Motor Corp. after the closure of their joint venture in California left 4,700 without jobs.

In operation for 25 years, New United Motor Manufacturing Inc. churned out its last Toyota Corolla on Thursday.

The equally owned joint venture, a symbol of cooperation between Japanese and U.S. carmakers, was the only Toyota-operated plant with workers represented by the United Auto Workers union.