window motor doesn't always work on 2001 Buick Century

Sometimes the front left window will not go up or down

Asked by for the 2001 Buick Century
Most likely a faulty window motor. The only way to know for sure is to remove the door panel and test the motor while it is not working.
2 more answers
where is the instrument panel fuse for a 1990 buick century?
where is the fuse for the instrument panel?