1995 Buick Park Avenue

I know you don’t want to hear this, I did not either. I have a 02 Park Avenue. My driver’s seat would not go up or down. I could hear the motor run as you indicated on yours. Buick and junk dealers will not sell the motors individually, but will sell the entire assembly. New about a thousand bucks, and $300 to install. Used, starting about $450 plus postage. I did not think it worth the money to fix it, so I turned the worm shaft to a convenient height and left it there.