When using the AC or Heater, the fan makes a noise (on low)sometimes louder than others.
Almost sounds like there is something inside the fan is hitting. How would I look at the fan to see what is there?
Would the owners manual for a Cobalt be the same for an HHR?
In order to visually inspect the fan and motor you would more than likely have to remove your passenger glove box and possibly a portion of the lower dash as well. However, if its already making noise it's probably going bad already.
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