I got home today and went in the house. I went back outside an hour later and I noticed my car was making a high-pitched sound, which seemed to be coming from the front passenger for about 20 secs. It stopped and then did it again about 10 minutes later. It has been happening on and off ever since. Any advice?

 

this has been covered. my car does it too. i dont know if we ever came up with a reason, but it is normal

 

Do you have Logic7 with CDs loaded in the glove box changer? Could it be the CDs being scanned? I believe low battery can cause the CD changer to cycle like that.