FLINT, Mich. — General Motors plans to invest more than $1 billion in two Flint manufacturing plants for the production of the next-generation internal combustion engine heavy-duty trucks.

Gerald Johnson, executive vice president, Global Manufacturing and Sustainability, said today that the company will build internal combustion vehicles throughout this decade, in addition to making electric vehicles.

GM has a goal of building only electric passenger vehicles in the United States by 2035.

The Detroit automaker reported a 38% year-over-year increase in heavy-duty pickup sales last year, with nearly 288,000 trucks sold.

GM will invest $788 million in the Flint assembly plant, with updates including a body shop building expansion, general assembly conveyor expansion, and new tooling and equipment.

The company will invest $233 million in the Flint metal center for new stamping dies to support production of its next-generation ICE heavy-duty trucks, as well as press refurbishments and new equipment.

This latest investment brings GM’s U.S. manufacturing and parts distribution facility investment commitments to more than $30.5 billion since 2013.