why is my driver side window not working? It won't go up or down?

since its more of a common problem with GM automobiles im gonna say its the motor ,they can tend to work one min and the next nothing .if u take of the panel and smack the motor a bit whiole pushoing the button u will get it to go up some times . but u definetly need a motor

Lift motor is most likely your problem. Regulator next. Followed by switch. Will need a mech. to check it.