FLINT, MI—General Motors Co. plans to invest $918 million in four U.S. manufacturing sites, including $854 million to prepare these facilities to produce the company’s sixth generation small-block V-8 engine and an additional $64 million in Rochester, NY, and Defiance, OH, for castings and components to support EV production. These investments will enable the company to strengthen its full-size truck and SUV business and support the company’s growing EV product portfolio.

The announcement brings GM’s U.S. manufacturing facility investment commitments to more than $37 billion since 2013, including the carmaker’s joint venture plants with battery manufacturer Ultium Cells LLC.

Specifically, GM will invest $579 million at its factory in Flint to assemble new V-8 gas engines, along with the related block, crank and head machining. Work at the facility will begin immediately. Flint will continue building the 3-liter turbo-diesel engine during the facility renovations. That engine is used in a variety of light-duty truck applications.

GM will invest $216 million at its factory in Bay City, MI, to make camshafts, connecting rods, blocks and heads for future V-8 production at Flint.

GM will invest $55 million at its factory in Defiance, OH. Some $47 million will be spent to prepare the facility to produce block castings to support future V-8 engine programs. In addition, the investment includes $8 million to build a development cell for castings to support future EV strategies.