Brookville DMAX Expansion Highlights the Project Work Behind a Major Ohio Manufacturing Investment
BROOKVILLE, OH / ACCESS Newswire / March 19, 2026 / General Motors' Duramax Engine Plant (DMAX) expansion in Brookville has become one of the region's most significant industrial projects, tied to a $920 million investment supporting Duramax diesel engine production for GM heavy-duty truck programs, including Chevrolet Silverado HD and GMC Sierra HD models. Public reporting has described the Brookville work as adding about 1.1 million square feet to the existing facility which was previously approximately 250,000 square feet. Notably, the project has created and supported hundreds of local jobs as the site expands its manufacturing footprint in southwest Ohio. This expansion quadruples the current facility size and is designed to create over 800 jobs, supporting high demand for diesel trucks.