I bought my 12 Impala with an aftermarket OnStar system. I was told the unit was in the trunk. Not in the trunk. Checked it all over. I need to replace the back up battery in the unit.

Someone give me an idea where to look?

Thank you!
John

 

I have the same question on my 2009 HHR, where is the onstar battery backup located
thanks,

 

There are several threads on that subject, click on the Search bar for the forum and put in OnStar backup battery

 

I have a 2011 chevy hhr can I get onstar put in it.

 

Jim874 :

Your 2011 HHR should come standard with the OnStar hardware already installed. To activate your system, simply press the OnStar button inside the vehicle and tell the activation specialist that you wish to activate your subscription. If your vehicle does not have OnStar hardware in it, you can check vehicle compatibility here : http://bit.ly/17fviGC. Let me know if you have any questions.

- Sara, OnStar Advisor
Social Media Team

 

jim874 Welcome to the forum

Are you the original owner or is it used?
Its been my experience that some rental cars may not include the OnStar equipment and sometimes also lack the satellite radio features, particularly on the economy size vehicles...