One problem related to battery cable 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.
I problems with the fuse for the transmission/engine console and the engine cut off. Ignition issues where my key gets stuck always had to pull fuse for lights and disconnect battery cable. Airbag light always stayed on. Sensors is off, air conditioner does not work. Heater and air work whenever it wants to. Replace exhaust system.