DETROIT — Chrysler Group LLC plans to restart seven assembly plants at the end of June after silencing all of its factories during its six-week stay in Chapter 11 bankruptcy protection.

The company on Wednesday confirmed that factories in Sterling Heights and Warren, Mich.; St. Louis; Toledo, Ohio; Brampton and Windsor, Ontario; and Toluca, Mexico, would restart operations June 29. A plant in Detroit that makes the Dodge Viper sports car restarted Monday.