Wentzville Assembly is an automotive assembly plant in

Wentzville, Missouri Wentzville is an exurb of St. Louis that is located in western St. Charles County, Missouri, United States. As of the 2023 U.S. Census Bureau estimates, the city had a total population of 47,497, making it the 15th largest city in Missouri. Went ...

, United States, owned and operated by

General Motors General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. The company is most known for owning and manufacturing f ...

. 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 St. Louis ( , sometimes referred to as St. Louis City, Saint Louis or STL) is an independent city in the U.S. state of Missouri. It lies near the confluence of the Mississippi and the Missouri rivers. In 2020, the city proper had a populatio ...

, just off of

I-70 Interstate 70 (I-70) is a major east–west Interstate Highway in the United States that runs from I-15 near Cove Fort, Utah, to I-695 and Maryland Route 570 (MD 570) in Woodlawn, just outside Baltimore, Maryland. I-70 appr ...

. With a similar floor plan to its contemporaries, Michigan's

Orion Assembly Orion Assembly is an automotive assembly plant in Orion Township, Michigan, United States, owned and operated by General Motors. From late 2025, the plant is slated to assemble the Chevrolet Silverado EV and GMC Sierra EV battery electric p ...

and

Detroit/Hamtramck Assembly Detroit/Hamtramck Assembly, also referred to as Factory Zero (and historically as GM Poletown), is an automotive assembly plant located on the border between Detroit and Hamtramck, Michigan, United States, owned and operated by General Motors. I ...

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. In 1996, production shifted from manufacturing unibody, front-drive passenger cars to rear-drive, body on frame trucks, GM's full-size

Chevrolet Express The Chevrolet Express (also known as the GMC Savana) is a series of full-size vans produced by General Motors since 1996. The successor to the Chevrolet G-series van, the Express is produced in passenger and cargo variants. Alongside the stan ...

and

GMC Savana Savana is a town and commune in Madagascar. It belongs to the district of Vohipeno, which is a part of Vatovavy-Fitovinany Region. The population of the commune was estimated to be approximately 4,000 in the 2001 commune census. Only primary s ...

cargo vans on the GMT600 platform, previously manufactured at

Lordstown Assembly The Lordstown Complex is a factory building and automotive manufacturing plant in Lordstown, Ohio, U.S. Lordstown is an industrial suburb of Youngstown, Ohio. It was a General Motors automobile factory from 1966 to 2019, comprising three faci ...

(Ohio) and Flint Assembly (Michigan). The changeover involved completely gutting and revamping the plant to provide robotic body assembly. The GMT600 vans received a significant revision for the 2003 model year, known internally as the GMT610, which included a new front end, new powertrains ("LS" engines), left hand side cargo doors, and AWD models. In 2014, GM replaced the lighter 1500-series vans with the Chevrolet City Express built by

Nissan is a Japanese multinational Automotive industry, automobile manufacturer headquartered in Yokohama, Kanagawa, Japan. The company sells its vehicles under the ''Nissan'' and ''Infiniti'' brands, and formerly the ''Datsun'' brand, with in-house ...

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

, retaining manufacture of the commercial-grade models in Wentzville. Also in 2014, Wentzville began manufacturing the

Chevrolet Colorado The Chevrolet Colorado (sharing mechanical commonality with the GMC Canyon) is a series of compact pickup trucks (mid-size since second generation) marketed by American automaker General Motors. They were introduced in 2004 to replace the Chevrol ...

and

GMC Canyon GMC may refer to: Government India * Gandhinagar Municipal Corporation, in Gujarat * Gobichettipalayam Municipal Corporation, in Tamil Nadu * Guntur Municipal Corporation, in Andhra Pradesh * Guwahati Municipal Corporation, in Assam * Gwalior ...

, whose predecessors had been manufactured at the shuttered Shreveport Assembly factory in Louisiana. Wentzville has received numerous quality awards over the years for both the mid size truck and full size van models.

Vehicles produced

Current

2014–present *

1996–present *

1996–present

Past

Buick Electra The Buick Electra is a full-size luxury car manufactured and marketed by Buick from 1959 to 1990, over six generations. Introduced as the replacement for the Roadmaster lines, the Electra served as the flagship Buick sedan line through its en ...

1985–1990 *

Buick Park Avenue The Buick Park Avenue is a full-size car built by Buick. The nameplate was first used in 1975 for an appearance option package on the Electra 225 Limited. It became an Electra trim level in 1978 and its own model starting in the 1991 model year ...

1991–1994 *

Pontiac Bonneville The Pontiac Bonneville is a model line of full-size or mid-size FR (until 1987) or FF cars manufactured and marketed by Pontiac from 1957 until 2005. The Bonneville (marketed as the Parisienne in Canada until 1981), and its platform partne ...

1989–1993 *

Oldsmobile 88 The Oldsmobile 88 (marketed from 1989 on as the Eighty Eight) is a full-size car that was sold and produced by Oldsmobile from 1949 until 1999. From 1950 until 1974, the 88 was the division's most profitable line, particularly the entry-level m ...

1986–1993 *

Oldsmobile 98 The Oldsmobile 98 (spelled Ninety-Eight from 1952 to 1991, and Ninety Eight from 1992 to 1996) is the full-size car, full-size flagship model of Oldsmobile that was produced from 1940 until 1942, and then from 1946 to 1996. The name – refle ...

1985–1989 *

Oldsmobile Touring Sedan The Oldsmobile 98 (spelled Ninety-Eight from 1952 to 1991, and Ninety Eight from 1992 to 1996) is the full-size car, full-size flagship model of Oldsmobile that was produced from 1940 until 1942, and then from 1946 to 1996. The name – refle ...

1987–1989

References

{{General Motors factories General Motors factories Motor vehicle assembly plants in Missouri 1983 establishments in Missouri Buildings and structures in St. Charles County, Missouri