Check the door runchannel. If they are bad, they can restrict the door glass movement causing it to go off track. Try some silicone based lubricant onto the runchannel where the door glass slides up. It might require repeated movement up and down to get the door glass moving smoothly again. DO NOT use oil based lubricants such as WD40, they would agrave the problem as oil would damage the runchannels causing the door glass to stick to the runchannels.
Monday, April 18th, 2011 AT 5:22 PM