# Vent Odor and Vibration

**URL:** <https://community.cartalk.com/t/vent-odor-and-vibration/37211>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, trailblazer\
**Created:** [September 27, 2009, 12:43am UTC](https://community.cartalk.com/t/vent-odor-and-vibration/37211 "2009-09-27T00:43:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cwsary](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@cwsary](https://community.cartalk.com/u/cwsary)\
**Post date:** [September 27, 2009, 12:43am UTC](https://community.cartalk.com/t/vent-odor-and-vibration/37211/1 "2009-09-27T00:43:17Z")

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The car sat for a week while I was away. It was completely closed so no water got in. When I returned home, there was a terrible smell coming from the vents; it smelled like a barn. When I turned on the vent, AC or heat, there is a lot more vibration than there was before. What is going on?

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**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\
**Post date:** [September 27, 2009, 1:16am UTC](https://community.cartalk.com/t/vent-odor-and-vibration/37211/2 "2009-09-27T01:16:37Z")

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Sounds like you have a camper in the squirrel cage.

The squirrel cage is the air pickup for the fan motor.

Probably a mouse.

You may have to dismantle some of the ductwork or at least the cover of the fan motor to see.