Thanks for the tip. I have the Ford SIB for it. There is a kit the dealer installs to stop it. You get some thicker rubber gaskets AND it also says to tape that wire up in tesa tape. Its nice to know the tape alone might work vs having to let dealer look at it. I will do mine and see if it stops. Thanks for posting this!It’s probably not the window itself, it’s the hard plastic coated power cord. When the window is open, the cord rolls up between the glass which allows it to vibrate against the glass. I folded down my rear seat and pulled the cord up out of its track with the slider closed. Then I wrapped it in Tessa tape, and put it back into the track. It stopped all of the noises coming from that slider window.