Location of battery in hhr 2007
3 Answers
There is no 2013 HHR. Production ended in 2011 with only a few being made that model year.
https://my.chevrolet.com/content/dam/gmownercenter/gmna/dynamic/manu als/2007/chevrolet/hhr/2007_chevrolet_hhr_getknow.pdf In the back by the spare tire according to this handout.