Have a 2009 hhr. outside air temp is not reading correctly. Can I change the sensor and where is it located

 

Yes the sensor is replaceable, but is yours really bad? They do "stick" on occasion if you haven't driven long enough for them to update, is yours "frozen" at one reading or are you not displaying any reading at all.

Before you decide to change your sensor out, give this thread a read.....

https://www.chevyhhr.net/forums/problems-service-repairs-42/outside-temp-display-20105/