The former General Motors plant in Shreveport has officially changed hands. GM’s lease is up and the court-appointed RACER Trust will now maintain the property. The Trust took title last year as part of the GM settlement agreement. Redevelopment manager Bruce Rasher says marketing efforts will be stepped up since the plant’s 3.1-million square feet are now vacant. Rasher says he’s optimistic that he’ll find a buyer, and he’s following up on promising leads alongside state and local economic developers.