DETROIT - General Motors (GM) is recalling 3.16 million more cars in the U.S. because of ignition switch problems. The company says it will change or replace the keys on the cars from the 2000 to 2014 model years.GM said the key could move out of the "run" position if there was a "jarring" event (such as hitting a pothole) and the keychain was carrying extra weight. That can shut off the engines and disable power steering.GM first learned of defect in 1999, probe findsGM says it is aware of eight crashes and six injuries due to this ignition issue. The recall is part of a GM review of ignition switches after the company recalled 2.6 million older small cars earlier this year for a similar problem.GM also is recalling 166,000 other cars for a different series of problems, bringing Monday's recall to more than 3.3 million cars. This brings the total ignition switch recalls in 2014 to 7,542,673 vehicles and the the total number recalls for all vehicles in 2014 to 17,728,268.