One of the most common minor problems that drivers face is a stuck window. The usual problem is that the window has slipped out of its track in the door frame. Whether a window is manual or electric, it moves up and down via rollers on a track. Because of its simplicity, this is one of the easiest problems for a car owner to tackle in his or her own garage.
Study a diagram of your car's door. Check your owner's manual, or see what's available at the library or online. The screws that hold a door panel in place can be hidden or hard to reach, and a repair manual can help you understand how to disassemble the door.
Unscrew and remove the window cranks, armrests, cupholders and any other attachments on the door panel. Remove the screws securing the door panel to the door.
Remove the door panel. Check to see whether the window's rollers are lined up in their tracks.
Examine the rollers. If they are worn, you will need to replace them. You can get new rollers through the dealer or an aftermarket speciality business.
Align the window and the rollers in the track properly. Improper or insufficient lubrication is often the cause of off-track rollers, so that's the last thing you'll want to take care of before you put the door back together. Clean all dirt, grease and dust from the window apparatus. Lubricate the rollers and the tracks with white lithium grease.
Secure the door panel over the interior of the door. Reinstall the window roller, armrest and other attachments.