There is a known issue with the cable pulley system in the 2000's (not sure if it extends to others). There is a plastic/nylon housing that breaks causing the cable to become twisted and allowing the windows to fall. When buying the replacement part, it comes as a kit which includes the motor and cable as well as the track - everything you need.
Good news, bad news, if you have done much research you will find that MANY people have had this issue and have had it fixed at about $400 a pop, only to have it happen again.
The stock parts from GM are going to break again. There is a place on e bay that sells the part but I have not tried it to see if it works.
My two rear windows are secured in place by installing a bolt and a nut on the track to prevent the window from falling.
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Monday, January 19th, 2009 AT 12:40 PM