Driver seat won't move up and down. Anyone ever replace the motor?
 

My driver side power seat won't move up and down. The front of the seat goes up and down but the rear won't. I hear a loud buzzing noise whenever I try to do it so it's not like the motor is completely dead. Just curious if anyone has ever had this happen to them and what they've done about it.

Also, whether anyone has ever replaced the motor. I can't imagine it being too difficult. Is it a separate motor that moves the front and the back of the seat up and down?

anybody?