Report: Door would not automatically unlock from the remote or when the master lock switch was opened and the window would not work.
Buick LeSabre Problem
Model Year Affected: 2001
Left Rear Door Module (Part #: 25654368) was bad -- Symptom: door would not automatically unlock and the window would not work.
troubleshooting: pried off the plastic cover behind the door handle (start at the hinge side), removed single screw and then starting at the bottom pulled off the door covering (It is held in with plastic snaps), found 12v going into the door module and deduced the module was the problem; found one on ebay motors for $50, when it arrived, I unscrewed the 2 nuts, unplugged the 2 connectors, installed the 'new' part and all is working.