As the auto industry rushes to gain market share in the electric vehicle sector, not all automakers are giving up on the internal combustion engine. General Motors has announced it is going to invest over $1 billion in two manufacturing plants in Flint, Michigan which will focus on the production of the automaker’s next-generation heavy duty trucks featuring internal combustion engines.

On Monday, Gerald Johnson, executive vice president of Global Manufacturing and Sustainability, said that in addition to making electric vehicles, the company will continue to build internal combustion engine vehicles through the end of this decade.

The company has previously declared it has set a goal of building only electric passenger vehicles in the United States by the year 2035.

Last year the Detroit automaker saw a 38% increase in heavy duty pickup sales compared to one year prior, with almost 288,000 trucks sold.

As part of its announcement the company revealed that it plans to spend $788 million in its Flint assembly plant, updating it by expanding its body shop building, its general assembly conveyor, and adding new tooling and equipment.

It also announced it would be spending $233 million in its Flint metal center on new stamping dies, in support of its next-generation ICE heavy duty truck production, as well as on new equipment and press refurbishments.

With this investment, GM will have committed over $30.5 billion to investments in its US manufacturing and parts distribution facility.