Mary Barra's honeymoon period as the new CEO of General Motors is officially over. Shortly after taking over the reins, Barra had to deal with the fallout from the faulty ignition switch debacle, a remnant left over from the "old GM," but still very much her problem today. Just last week she testified before US Congress and Senate committees, who grilled her with many hard questions. Fortunately, she handled herself impressively well. Over the weekend, however, some more bad news has been announced by GM.

First off, some 490,200 full-size trucks and SUVs, the 2014 and 2015 Chevy Silverado 1500, Tahoe and Suburban, and GMC Sierra 1500 and Yukon, have been recalled due to a transmission issue. The specific problem is loose oil cooler lines that could result in a fire. Along with those models, GM then issued a stop-sale order for the Chevy Cruze turbo. 2013 and 2014 model years have also been recalled. The reason? To replace a right front axle half shaft that can fracture and separate without warning during normal driving. All told, 4.8 million GM vehicles have been recalled since last month.