I ran my car through the car wash on a cold day, and the next day after starting it up the blower ran on high. The speed control was gone, and when I shut off the car and pulled the key, the blower continued to run on high until the battery died. Since then I've been pulling the 30 amp fuse on the panel under the hood on the passenger side. After doing an Internet search, I've found that this problem happens to many GM car owners. I pulled every fuse and relay on the fuse panels on both sides of the dashboard and under the hood ... no luck. I also pulled the glovebox off and checked for an obvious burnt relay or fuse under the dash and found none. I finally took it to a dealer to get soaked in the wallet for what appears to be an obvious design flaw of some kind. Just check out the Pontiacs on this site that have had this problem. Sheees!