The latest recall was issued because the electronic power-steering assist can suddenly stop working, making it harder for drivers to steer.
The initial recall - now at 2.6 million small cars for an ignition switch defect - prompted GM to name a new safety chief and speed up the review of cases that might lead to recalls.
The new recall includes:
- Chevrolet Malibu from the 2004-2005 model years, plus some 2006, 2008 and 2009 model-year cars.
- Chevrolet Malibu Maxx from the 2004-2005 model years, plus some 2006 model-year cars.
- Chevrolet HHR from the 2009-2010 model years (non-turbocharged only).
- Some Chevrolet Cobalts from the 2010 model year.
- Some Saturn Auras from the 2008-2009 model years.
- Saturn Ion from the 2004-2007 model years.
- Pontiac G6 from the 2005 model year, plus some cars from the 2006, 2008 and 2009 model years.
- Service parts installed into certain vehicles before May 31, 2010, under a previous recall
GM says no deaths related to the defect have been reported. Dealers will replace the power steering motor and other parts for free.
The Associated Press contributed to this report.