Question about 2001 Pontiac Montana
Only the first 4 positions work.
I have put up with the same problem until I found a solution today. For me, I believe it was a two part solution:
First, there is a 30 amp fuse (?) located in the passenger side fuse box (next to the door). I believe the fuse was labeled something similar to "HVAC Blower High". Looking at the box, it was the fuse in the very bottom-left position. This is not what I would call a bus fuse so I couldn't tell by looking at it that the fuse was bad. I first tried switching this fuse for the electronic window fuse. I was able to lower the driver's side window so I thought the fuse was good. However, it was not until after I completed step two (below) that I realized that I could not lower the passenger side window from the driver side control. I switched the two fuses back and the window controls worked fine. So, I replaced the suspect fuse and the problem was resolved.
Second, I read online this morning that a bad blower resistor could cause this problem. I also read that the part was fairly easy to replace on this model so I thought it was worth a try. I bought a replacement at my local dealer for $49. To install, I removed the bottom panel from the passenger side (right under the glove box) by pulling down on the three panel "screws". With the panel down, the heater blower was exposed. I found the resistor located just behind the blower. I unplugged the resistor from the blower as well as the wire harness located immediatly on the resistor. I then removed the resistor by removing the three (3) 5/16" bolts. The entire operation took about 20 minutes from open to close. ....the majority of that time was spent trying to get my big fingers around the bolts.
All 5 positions now work. ....Now if I could just resolve the problem with the windows frosting.
Posted on Jan 30, 2009
This is often an indication that the blower motor resistor has gone bad. The good news is that its relatively cheap to replace, the bad news is depending on where your blower motor is, they can be challenge to get to and replace.
Posted on Jan 03, 2009
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Posted on Jan 02, 2017
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