GM to Invest $920 Million to Expand Duramax Diesel Plant in Ohio

June 21, 2023

“This investment furthers our commitment to HD truck market dominance with the Duramax power under the hood that customers love so much,” said Mike Trevorrow, vice president, North America Manufacturing.

IW Staff

GM plans to expand production of future internal combustion engine (ICE) heavy-duty truck powertrain products with a $920 million investment in its Duramax (DMAX) Brookville (Ohio) facility.

The 1.1 million-square-foot expansion will more than quadruple the current size of the plant. The investment will also add new technology and equipment.

The investment will bolster the company’s full-size truck businesses and provide jobs. The hourly workers of the Brookville facility are represented by the International Union of Electrical Workers-Communications Workers of America (IUE-CWA) Local 755.

“This historic investment and expansion announcement is a testament to the work ethic of the IUE-CWA members at this company and I could not be prouder," said IUE-CWA International President Carl Kennebrew, .

This announcement marks the third investment in Ohio manufacturing operations from GM in the last 10 months, including $55 million to support the production of V-8 engine block castings and future EV strategies in Defiance, Ohio.