Wentzville Assembly

Wentzville Assembly is an automotiveassembly plant in Wentzville, Missouri, United States, owned and operated by General Motors. The plant currently assembles the Chevrolet Colorado and GMC Canyon midsize pickup trucks, and Chevrolet Express and GMC Savana full-size vans, for the North American market. Opened in 1983, the 3.7 million square foot plant sits on 569 acres approximately 40 miles west of St. Louis, just off of I-70.

With a similar floor plan to its contemporaries, Michigan's Orion Assembly and Detroit/Hamtramck Assembly plants, the facility includes vehicle assembly as well as body stamping facilities. Originally manufacturing full-size Buick, Oldsmobile and Pontiac sedans, the plant assumed operations of the previous St. Louis Truck Assembly which had been in operation since 1920.