SAN ANTONIO—Toyota Motor Corp. is investing $391 million at its truck assembly plant here. The new spending brings the automaker’s total investment in the factory to more than $3 billion.

The announcement comes as part of a broader commitment from Toyota to invest $13 billion in its U.S. operations over the next five years through 2021.

The new investment also comes with a commitment by Toyota Texas to continue funding local workforce development. Alamo Promise will receive a $500,000 donation from Toyota Texas over a five-year period. Alamo Promise’s mission is to end poverty, enhance economic and social mobility and meet workforce demands throughout the city.

Separately, Aisin AW, a supplier to Toyota Texas and other automakers, announced that it will invest $400 million and bring 900 new jobs to a future assembly plant in nearby Cibolo, TX.

“The Lone Star State continues to build on its reputation as a manufacturing powerhouse thanks to investments from innovative companies like Toyota and Aisin AW,” says Gov. Greg Abbott. “Their combined new investment of nearly $800 million in the San Antonio area is a testament to Texas’ unrivaled workforce and commitment to creating an environment where businesses can thrive.”

The investment is aimed at increasing the plant’s flexibility and introducing advanced manufacturing technologies.

The plant assembles the full-size Tundra and midsize Tacoma pickup trucks. It directly employs more than 3,200 people. Including its 23 on-site suppliers, total employment at the plant’s site tops 7,200.