General Motors announced two more recalls late Friday, bringing to 4.8 million the number of cars, trucks and SUVs the automaker has called back for repairs in the past month, according to Reuters.

The string of recalls, topped by an ignition switch problem in compact cars now linked to 13 crash deaths, has embarrassed the company and sidetracked its new CEO, who started work just over two months ago, Reuters reported.

GM has admitted knowing about the switch problem a decade ago, yet it didn't recall any cars until February, according to Reuters. The recall delay has brought two congressional investigations and probes by the Justice Department and the National Highway Traffic Safety Administration.

Late Friday night, GM announced it would recall 490,000 late-model pickup trucks and SUVs because transmission oil cooling lines weren't secured properly in their fittings, Reuters reported. Transmission oil can leak from a fitting and hit hot surfaces, causing fires, the company said in a statement.

GM said it knows of three fires and no injuries, according to Reuters. The recall affects Chevrolet Silverado and GMC Sierra 1500 pickup trucks from the 2014 model year, as well as 2015 Chevrolet Suburban and Tahoe SUVs and the GMC Yukon and Yukon XL SUVs.

The Silverado is GM's top-selling vehicle and an important profit center for the company, Reuters reported. The GMC Sierra also is among GM's top sellers.

Also Friday night, GM announced the recall of 172,000 Chevrolet Cruze compact cars because the right front axle shaft can fracture and separate while being driven, according to Reuters. The recall allows dealers to resume selling affected Cruzes after GM issued a stop sale order on the cars Thursday night.

GM also said Friday that it has found another death attributed to the ignition switch recalls, bringing the company's count to 13, Reuters reported. The additional fatality happened in 2013 and involved a 2007 Chevrolet Cobalt in Quebec, Canada. The company didn't give further details of the crash.