I have a grand prix and my heater fan is going out. It all started with the fan speed knob not working on 1-4 but working on 5. Now it will smoke and make very loud squeeling noises and vibrate and sometimes just completely stop. I need to know what it could be. I can't describe the noises very well but you can clearly hear them if i were to record them one day. I need help to figure out what needs to be done. 
And I would change this fan how? LOL...
And I would change this fan how? LOL...