General Motors is investing $157 million in its Wentzville Assembly plant in Missouri to upgrade the facility’s paint shop. The investment is focused on paint and modernization upgrades, including new processing equipment and an estimated 28,000-square-foot expansion.
The upgrades include a major refurbishing of the plant’s existing paint shop. GM aims for the Wentzville Assembly plant to remain a key part of its U.S. manufacturing footprint over the long term.
The Wentzville Assembly plant, which opened in 1983, currently builds the Chevrolet Colorado and GMC Canyon pickups; and Chevrolet Express and GMC Savana full-size vans. The plant has over 4,000 employees.
“These announcements are about more than any one program, product, or facility,” said Mike Trevorrow, GM SVP of Global Manufacturing, in a statement. “They show how we’re building flexible, long-term manufacturing sites that can meet today’s demand, support future launches, and strengthen our production footprint — while continuing to invest in the people who make it all possible.”
GM is also investing in other facilities, such as its Spring Hill, Tennessee plant, where it plans to spend $275 million to support the automaker’s new 2.7L inline 4-cylinder engine program for its full-size and midsize trucks.
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In May 2025, GM announced plans to invest $888 million in its Tonawanda Propulsion plant in New York to produce its next-generation 5.7L and 6.6L V8 gas engines, which will debut in the redesigned 2027 Chevrolet Silverado pickup slated to arrive at dealers later this year.
GM also plans to shift production of the Chevy Blazer to Spring Hill next year. Both the gas-powered Blazer and Blazer EV are currently built at GM’s Ramos Arizpe Assembly Plant in Coahuila, Mexico.
In total, GM said it will invest approximately $9 billion across its U.S. manufacturing footprint this year alone, as well as another $7 billion on U.S. research and development to boost its U.S. manufacturing capacity and launch new vehicles.
During the company’s Q2 earnings call on July 21, Chair and CEO Mary Barra noted the automaker’s share of the U.S. full-size pickup market stood at more than 42% through the first half of 2026, which is more than 10 percentage points above that of its closest competitor. They are focusing on increasing production of full-size trucks and SUVs to meet demand.
