[doctorhrdware]

It is the AC/Heat control module that is bad. It is the heat / ac blend door that is slamming. If you turn that middle control knob counter clockwise, just a bit, it will stop the door from slamming. I had the same issue with the Wife's 2000 Silverado. Change the control head, and it solved the issue. I believe that it is caused by cold solder joints on the AC/Heating control module or the control pot(not sure if it is or not) for the blend door? I have to toke the module apart and see what type the for the blend door. I have not fixed the one that came out of the wife's truck as of yet. I also need to replace the grain of wheat lamps. Most of the lamps are burned out. Even on the used one that we bought. I am thinking of installing LEDs instead of the grain of wheat lamps. The filament does not hold up like the led can. I need to order the leds first in order to complete the repair. I am thinking of using either blue or white, or possibly red. I want to see which one looks the best. After I am done I will post pictures of all three different LED colors. I will take the pictures at night, so that I can choose what looks the best.