General Motors (GM.N) said in a court filing on Wednesday that it should not have to face lawsuits based on safety issues in cars made before its 2009 bankruptcy, including a faulty ignition switch that led to the recall of 2.6 million cars earlier this year. The brief, filed in Manhattan bankruptcy court, lays out GM’s legal arguments and is the opening salvo in litigation from GM drivers who say the automaker should make them whole for losses related to recalls this year. In April, GM asked Judge Robert Gerber of the U.S.