Published reports say General Motors Corp. and Chrysler LLC have held preliminary talks about a merger or an acquisition of Chrysler by GM. The Wall Street Journal, citing people it described as familiar with the discussions, says Cerberus Capital Management, the private equity firm that owns 80.1 percent of Chrysler and 51 percent of GMAC Financial Services, proposed trading Chrysler's automotive operations to GM. The Journal says Cerberus would receive GM's remaining 49 percent stake in GMAC.