One problem related to engine shut off without warning has been reported for the 2011 Chevrolet HHR. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Chevrolet HHR based on all problems reported for the 2011 HHR.
Driving on I-25 on the west side of eisenhower pass & the engine shut off leaving me with no power steering or breaks. I was able to thread my vehicle through semis & spring break ski traffic to the side of the road to a runaway semi lane. The car restarted after I stopped shaking & was able to make it home to basalt. 2 months later the same thing happened on CO hwy 82 on a straight away between carbondale & glenwood springs. I was able to safely maneuver the car to the side of the road. Both times I checked the internet for recall information finding nothing. The recent media attention alerted me to the current recall & have called my dealership & made an appointment for the ignition switch to be replaced.