2007 Navigator Driver Window Squeaks Loudly

Anyone have any insight on a loundly squeaky driver side window?

Many times these squeaks are caused by dirt being caught in the felt of the window sashes that run along the door, where the window runs into the door, not the run channels. You can try blowing them out with compressed air or spraying them with silocone spray. Most times they need replace if that is the problem.

It's also possible there is a problem with the regulator.