To fix squeaky power car windows you will usually need some sort of lubricant like WD40 and a flathead screwdriver. Squeaky power car windows are caused from the window track that came from the factory with lubricant already applied wearing off after being used for years. The door panel will have to be removed below the window that is squeaking. Find the track that is making the noise and apply a lubricant to it and roll it up and down to make sure it works. Reinstall in the door panel and the noise should be gone.