I have a 2008 Volvo XC70 that makes a horrible high pitched squeak that sounds like it’s coming from the back door while driving. Gets worse over bumps and it can be heard from outside the car. Any ideas what it could be?
Nope. But noises are difficult to diagnose if you are IN the car hearing them. It is impossible for me to do that from the internet. Take it to a good local independent repair shop