Unsubstantiated rumors of an added shift were partly correct. Sergio Marchionne has just announced a second shift at the Sterling Heights plant which makes the 200 and Avenger (Sterling Heights), despite a tight supply of Pentastar V6 engines (they can also use four-cylinders). This may indicate an uptick in sales. There has been no word (so far) of another shift at Jefferson Avenue, which makes the Durango and Grand Cherokee.