Looking to see if anyone has had a similiar problem. I was sitting at a traffic light and the truck started to make a terrific noise and vibration. At first, I thought it was something outside.

It was a cold day so I had the heat on. The fan was on the second position and the vent was on. At first I adjusted the fan selector, but the noise continued. Then I turned the vent off and the noise and vibration went away. The noise and vibration return with the selector in any position (vent, floor, defrost, floor/vent). I have not tried the air conditioner, but would expect the same.

I would have expected it to be the blower motor, but sounds like the vent motor.

Any ideas on the exact cause and how big a job this might be to resolve?

Any ideas would be appreciated. Thanks, Willie

 

I've experience the same sort of vibration, but have been unable to determint the cause of it.

Anyone out there have any answers??