US car manufacturer General Motors (GM) expects to spend nearly $300m (?180m) in the first quarter to repair vehicles affected by its recent recalls.The firm set aside the amount on Monday as it announced three separate recalls affecting nearly 1.5 million vehicles.That follows the 1.6 million vehicles it called back last month over faulty ignition switches.GM is facing an investigation over its handling of the recall over the faulty switches which can disable airbags, reported the BBC.