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Old 09-24-2010, 10:14 PM   #18
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At least its "normal" we all hear it.
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Old 09-24-2010, 10:26 PM   #19
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yep, i hear it to and wondered what it was
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Old 09-24-2010, 11:34 PM   #20
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its from the 2 missing cylinders.
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Old 05-13-2013, 06:34 PM   #21
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Did anyone get a real answer to this noise ??? electronic humming sounds about 5 sec after shut down Then sounds like a marble dropping ???

Thanks
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Old 05-13-2013, 07:02 PM   #22
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This thread is back from the dead! But I do hear exactly the same thing and wonder what it is also!
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Old 05-13-2013, 07:05 PM   #23
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Quote:
Originally Posted by CamaroKid300 View Post
^ indeed!

I don't mind if the noises I am hearing are normal... but when I have never had a nice car like this I want to be sure everything is running as close to perfect as possible!
Normal, I hear it all the time. Sounds like an air damper to me. Clicks open when first starting, then sound like it drops in place when shutting off.
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Old 05-13-2013, 08:27 PM   #24
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Its an anti theft device on automatics that lock the engine for remote start. its explained in the manual
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Old 05-13-2013, 09:12 PM   #25
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Originally Posted by right to travel View Post
Its an anti theft device on automatics that lock the engine for remote start. its explained in the manual
It's happening with manual transmissions also if you would look at what people reporting the sound are driving.

I have never seen in the manual about the remote start locking the engine against theft. Where exactly is that explained?
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Old 05-16-2013, 11:34 AM   #26
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I also looked in manual I don't see it explained at all ? Went to GM service department talk to an A tech and he did not know ?
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Old 05-17-2013, 01:03 AM   #27
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To be honest my v8 auto does the same thing.... Makes the noise and I don't know what it is
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Old 05-22-2013, 10:20 PM   #28
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I now have a 2012 SS and I don't have the sound...this was on my 2010 1LT

But thanks for the revive
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Old 12-07-2013, 01:55 PM   #29
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The sound is coming from the the throttle body after the vacuum from the PCV is lost due to engine not running.
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