That's odd.
Go to the front of your car and lightly press on the edges of the glass to see if it makes that noise.
It could be something else.
Maybe the adhesive failed, or it's your vinyl trim or something.
Inspect the glass for hairline cracks. If it's going to break I don't think you can stop it, but check some glass companies in your area and see if they can recondition it if you find the glass is what's making the sound.
|