In 2005, the plant had a yearly production of 198,142 vehicles. Harbour Consulting rated the Ion line as the tenth most efficient auto plant in North America in 2006. After GM considered idling or shutting down the plant as part of its restructuring effort, it idled in March 2007 for a 1-year retooling project to produce the 2009 Chevrolet Traverse after receiving incentives from the State of Tennessee. Changes include adding metal stamping and removing the plastics plant (the Saturn production lines used plastic-based panels). General Motors has stated the plant will manufacture various GM vehicles and no longer be dedicated to Saturns. The vehicle assembly part of the Spring Hill plant was idled in late 2009 when production of the Traverse was moved to Lansing Delta Township Assembly near Lansing, MI, while production of power trains and metal stamping continued. Nearly 2,500 Spring Hill auto workers were faced with lay-offs, buy-outs and early retirement. In September 2011, it was announced that the plant would end its period of idling. In November 2011, GM announced plans for retooling of the vehicle assembly portion of the plant for use as an "ultra-flexible" plant which will initially be used to build the Chevrolet Equinox but will be designed for rapid retooling to other vehicles of similar size. In 2015, the plant announced that it would be reopening the entire plant's facilities, and would hire locally creating thousands of jobs for the surrounding area. General Motors looks to expand the plant's facilities and influence in the North American and Global Auto industries, and as of 2021, was the company's largest plant in North America. In January 2019, General Motors said it has invested $2 billion into the complex since 2010. In October 2020, GM announced that it was investing another $2 billion in the plant to build electric vehicles including the Cadillac Lyriq. Products Current Cadillac Lyriq (2022–present) Cadillac XT5 (2016–present) Cadillac XT6 (2019–present) GMC Acadia (2016–present) Former Chevrolet Equinox (2013–2015) Chevrolet Traverse (2008–2010) Holden Acadia (2016–2021) Saturn Ion (2002–2007) Saturn S series (1990–2002) Saturn Vue (2001–2007) References Bibliography General Motors factories Motor vehicle assembly plants in Tennessee Buildings and structures in Maury County, Tennessee 1990 establishments in Tennessee Saturn Corporation Buildings and structures completed in 1990 Tourist attractions in Maury County, Tennessee