I have a 2006 Ram 1500 Quad cab, 4.7L V8. The blower for the heat and A/C makes a "whistling" noise when turned on. The higher the setting... the louder the whistle gets. At first it was just the highest setting, but now it happens on all settings but the very lowest. I've heard of people removing the blower moter under the glove box, and removing a broken door to fix a similar issue. Said it took less than 10 minutes. I removed the glove box, and looked all around. I have no idea what I'm looking for, or what to remove. Does anybody have any suggestions on what may be causing the noise, how to fix, or better instructions on what to do? If I remove this "broken door" will it cause any harm? Thanks.