If you dont hear it buzzyng in there, check with multimeter if youre getting power to it, if yes, check the button. if you can open it up use the working button. if it dont work, then its your window motor.
SOURCE: drivers window goes up crooked and not closing
This can be 3 things wrong, either way the inside door trim panel has to be removed to inspect, 1} the glass has broken away from the glue holding it to the frame, 2} the mechanism has lost or has loose bolts holding it to the frame, 3} the mechanism is beyond economical repair and you need to replace the mechanism. Sorry I can't pinpoint it without seeing it, Remember to leave 4 thumbs up for this answer. We try to help as best we can, safe driving.
SOURCE: driver window will roll down but the passenger and rear wont
The first thing that I would do is check for electricty at the motors them sel and work your way back.If there is elec. at the window motor it's self susspect a motor problem.Remove the motor to see if it spins (but it dosen't me its good it could be week)next check for binding in the window mecanism.
SOURCE: 1999 Buick Century - passenger side power window does not work
Replace the Driver side window switch. These have a corrosion issue.
SOURCE: 2003 Buick Century - window problem
I've had a similar problem with my 2003 Buick Century. In my case, the driver's side front window one day went up and would not come down. I knew that the switch was malfunctioning by sticking in the up position since the window continued up despite the fact that Iet off the switch when the window was half way up and it continued going up. I had to pull over and pull the master switch assembly from the door panel and unplug it to prevent the window motor from being damaged by the constant power feeding it after the window was up. Basically, it would have burned the motor out. I cleaned the switch and it now works fine most of the time. I still need to replace the assembly. Not sure this is the reason in your case. I would check the back window and see if it goes down with the switch on the back door panel. If it does, then you are having problem with the master switch assembly on your front door panel. Moisture from rain from the window being down during rain or dirt may have corroded the switches' contacts.
SOURCE: 2002 Buick Lesabre drivers side window went down,
A couple of things to add to tinyp's solution. For Buicks, the regulator is bolted in, not riveted, which makes removal easier. Also, you'd better get used to this, as I have replaced 3 out of 4 window regulators on my 2002 LeSabre.
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