General Motors' 68-year-old Baltimore, Maryland, assembly plant is the only major GM factory earmarked for closing as part of the car maker's tentative new agreement with the United Auto Workers, union local presidents were told by UAW bosses, Associated Press (AP) reported. According to AP, the local officers were in Detroit on Sunday to hear highlights of the proposed four-year labour pacts announced last Thursday with GM, the last of the 'Big Three' United States car makers to reach an agreement, and with supplier Delphi Corporation.