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Annoying hum

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Old May 5, 2015 | 09:15 PM
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Default Annoying hum

Anyone else experience this in a convertible C6...see it happens on windy days going about 60 mph or higher. I get a humming noise which seems to come from the window or dash area. I can't find the source and was wondering if any of you Vette fans have heard same.
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Old May 5, 2015 | 09:19 PM
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I have it on my coupe from time to time. I'm guessing yours is coming from the plastic piece at the base of the windshield. Common problem. Some has replaced the piece with luck, others still get the noise/vibration. Check and see if all the clips are there and attached. Some have used epoxy with some luck.
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Old May 5, 2015 | 09:30 PM
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Originally Posted by spdkilz911
I have it on my coupe from time to time. I'm guessing yours is coming from the plastic piece at the base of the windshield. Common problem. Some has replaced the piece with luck, others still get the noise/vibration. Check and see if all the clips are there and attached. Some have used epoxy with some luck.
I had the same problem during colder weather. It is the plastic piece below the windshield that needs to be replaced.
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Old May 5, 2015 | 09:35 PM
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Originally Posted by teuhl
I had the same problem during colder weather. It is the plastic piece below the windshield that needs to be replaced.
Thanks! I'm heading to the garage!
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Old May 5, 2015 | 09:47 PM
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Originally Posted by SugarGrl
Anyone else experience this in a convertible C6...see it happens on windy days going about 60 mph or higher. I get a humming noise which seems to come from the window or dash area. I can't find the source and was wondering if any of you Vette fans have heard same.
Try This! Put masking tape along the front plastic windshield cowl. Tape the cowl onto the windshield. Take if for a ride and see if it disappears, if so the windshield cowl is warped and needs replacement. Air is flowing between the warped cowl and windshield causing a humming or vibration noise at freeway speeds.

A cheap fix is to use a silicone caulk between the cowl and windshield.

Last edited by Mike's LS3; May 5, 2015 at 09:50 PM.
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Old May 6, 2015 | 12:44 AM
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Yup. Very common problem. I stuck a piece of double-sided sticky tape between the windshield trim and the glass, about one foot in from the passenger side of the window. Problem solved for going on a year now.
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Old May 6, 2015 | 07:47 PM
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Thanks everyone! I did check the windshield trip and it is warped on the passenger side and loose.
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Old May 6, 2015 | 07:59 PM
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The deal is to make sure you have all the clips and they are attached to the windshield. I forget how many, I want to say 5. I added a little sealant to the clips to help attach to the windshield better.

Sounds like bees in a can, right.
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Old May 6, 2015 | 08:00 PM
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Was that problem limited to certain years? did they have it figured out by 2012?
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Old May 6, 2015 | 08:23 PM
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Originally Posted by SpeedUp
Was that problem limited to certain years? did they have it figured out by 2012?
My 12 GS had this prob. Painters tape proved it was the cowl piece. Dealer replaced with a new one, noise is gone.
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Old May 6, 2015 | 09:19 PM
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Sounds just like bees in a can! You are exactly right Boomer!
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Old May 7, 2015 | 12:38 AM
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it's been an issue since 2005, and most have DIY'd the problem with sealant under that piece so it stays in place.
Other GM models also have the same issue, all on the passenger side.
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Old May 7, 2015 | 08:01 AM
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This "cowl buzz" noise is fixed by recall campaign # 12260 which replaces the air inlet grill part 25778761
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