GM, one of the biggest employers in the Metroplex, is making changes to where some of most popular vehicles are manufactured.

The $4 billion investment also includes expansion of the Fairfax Assembly Plant in Kansas City, Kansas, and Spring Hill Manufacturing in Spring Hill, Tennessee. GM says the investment will allow the automaker to produce more than 2 million vehicles annually in the U.S.

General Motors says that moving production of the Escalade to a site in Michigan will allow the Arlington plant — a huge employer in DFW — to make more of other vehicles.