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Noise in dash

Tiny
POQ
  • MEMBER
  • 2007 CADILLAC CTS
  • 2.6L
  • AUTOMATIC
  • 128,000 MILES
With car on there is a noise in the dash. When I remove keys from ignition the noise is still there. It will come and go. Now my battery is draining over night. Took it to AutoZone they said the battery is fine and so is the alternator. This noise is really annoying it’s like something is tightening up maybe or trying to connect. I don't know it’s weird.

Engine is a 2.8 liter.
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Friday, September 20th, 2019 AT 9:30 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,645 POSTS
Welcome to 2CarPros.

If the battery light isn't on, then the alt is most likely fine. It may be an issue with an HVAC actuator going bad. Take a look at this link and let me know if it mirrors what you are experiencing. The directions are for replacement, but it explains what happens and the symptoms.

https://www.2carpros.com/articles/replace-blend-door-motor

Let me know.
Joe
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Friday, September 20th, 2019 AT 9:41 PM

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