need to replace heater/ac blower moter.
It,s a pretty tuff job,have to go under passenger dash, round box,remove screw,s and there it will be,but it sounds easy but really is not,you will definantly leave a little skin with it...Good luck with it
Need to find a copy of the recommended shop procedure and for a d.i.y. that pretty near impossible to find for free
Try your public library for a shop manual or You Tube for a how to video.
Looking for a Used Grand Prix in your area?
CarGurus has 2,877 nationwide Grand Prix listings starting at $1,995.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts