General Motors will invest more than $150m in its Saginaw Metal Casting Operations (SMCO) to support next-generation V-8 engine production.
The US automaker said the funding will be used to install new equipment and tooling at the Saginaw facility, forming part of its wider manufacturing plans.
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The site will support production of sixth-generation V-8 engine blocks and heads used in full-size pickup trucks.
GM plant director John Lancaster said: “By enabling the production of next-generation engine blocks and cylinder heads for full-size trucks, the plant is well-positioned for the future. This not only secures existing jobs but also strengthens the local economy, and ensures the plant continues to be an integral part of the automotive supply chain.”
The latest commitment follows around $5.5bn in investments made by the company in 2025.
It also comes after a previously announced $500m allocation in January 2023 for its Flint Engine plant to produce the same generation of V-8 engines.
At Saginaw, operations will continue for the current fifth-generation V-8 engines while preparations are underway for the next generation, which is scheduled to enter production in 2027.
The plant, one of GM’s oldest facilities in the US, employs more than 300 workers operating across three shifts.
The company indicated that the investment is aimed at ensuring the long-term viability of the Saginaw site while aligning production capacity with requirements tied to its upcoming engine programme.
General Motors added that it remains focused on advancing transportation technologies, continuing to manufacture petrol-powered vehicles alongside the expansion of its electric vehicle portfolio.
Separately, the company recently announced plans to invest $600m in its South Korean subsidiary, GM Korea, to modernise production equipment and introduce new vehicle models.
The amount is double the $300m outlined in December, following earlier speculation that GM could scale back manufacturing in the country after the introduction of US import tariffs.
GM Korea and its labour union marked the investment announcement at the company’s Bupyeong facility.
