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Discussion Starter · #1 ·
I have a Gen 1 (2015) and just leased a Gen 2 for my wife. The Gen 2 wind buffeting seems to be worse than I recall it being on my Gen 1. I called Chevy to find out if a service alert has been issued for the Gen 2's and was told there is none.

Does anyone have any information on whether they may issue a service alert or not?
 

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Were you lowering a rear window instead of a front one? In my 2017 there is almost no buffeting from the front windows. My 2013 was painful with any windows open and a speed above 40mph.
The Gen 2 does have some buffeting with a rear window down, but not anything like the Gen 1.
 

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If it's warm enough to drive around with a window open, it's no great effort to crack a diagonal rear window. I happen to hate wind noise and when car speed gets up to buffeting speed I close all windows. If you need a/c so does the battery, so you are borrowing a little cooling that is happening anyway and at little extra cost.
 

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I have a Gen 1 (2015) and just leased a Gen 2 for my wife. The Gen 2 wind buffeting seems to be worse than I recall it being on my Gen 1. I called Chevy to find out if a service alert has been issued for the Gen 2's and was told there is none.

Does anyone have any information on whether they may issue a service alert or not?
How odd, I owned TWO Gen I Volt's and was intimately familiar with its wind buffeting and how to manage it (lower right rear window an inch) and the first thing I did during my test drive on a Gen II was check out if GM addressed it. They did, in fact when I bought my 2014 Stingray I was amazed how well they tamed the infamous "AIR HAMMER" ALL previous Corvettes had since the C5.

I'm surprised your Gen II has this I wonder if that cabin vent in the rear hatch area is blocked preventing the release of the high pressure area? Seems like you need to visit your dealer.
 

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The Gen 2 does have some buffeting with a rear window down, but not anything like the Gen 1.
I can't compare to the Gen 1, but I do agree that lowering a rear window on the Gen 2 will create buffeting, beginning somewhere between 35-40 mph. Cracking the front passenger window a little usually reduces the pounding. Wish I could just leave the windows up, but the dog insists... :eek:
 

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Discussion Starter · #7 ·
I'm surprised your Gen II has this I wonder if that cabin vent in the rear hatch area is blocked preventing the release of the high pressure area?
What vent is this?
 

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Discussion Starter · #8 ·
If it's warm enough to drive around with a window open, it's no great effort to crack a diagonal rear window. I happen to hate wind noise and when car speed gets up to buffeting speed I close all windows. If you need a/c so does the battery, so you are borrowing a little cooling that is happening anyway and at little extra cost.
We've tried all combinations of cracking windows. Nothing seems to alleviate it. We live in SoCal so there is ample opportunity to drive with the windows down.
 

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What vent is this?
All my vette's since 1999 have had a rear vent in the rear hatch area that allowed cabin pressure be equalized or vented as needed. In 2014 GM over engineered what was a vent with some rubber flaps into some uber HIGH TECH piece of engineering.
http://autoweek.com/article/car-news/electric-wire-eases-closing-corvette-stingray-hatch

My C5 and C6's had the air hammer so bad it could physically hurt your ears and make you sick. With my C7 that problem was once and for all FIXED.

But I believe all hatchbacks have some sort of vent hidden in the rear usually under the carpet to vent pressure. I believe the Volt has a similar vent somewhere. If not shame on GM.
 

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I consider it to be a non-issue.
 

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How odd, I owned TWO Gen I Volt's and was intimately familiar with its wind buffeting and how to manage it (lower right rear window an inch) and the first thing I did during my test drive on a Gen II was check out if GM addressed it. They did, in fact when I bought my 2014 Stingray I was amazed how well they tamed the infamous "AIR HAMMER" ALL previous Corvettes had since the C5.

I'm surprised your Gen II has this I wonder if that cabin vent in the rear hatch area is blocked preventing the release of the high pressure area? Seems like you need to visit your dealer.
I don't recall seeing a vent when I peeked under the styrofoam padding under the Gen II's rear carpet. All I saw was blue metal, some thick cable bundles, and the 12V battery. No obvious grill where air would equalize or escape.

I have a Gen 1 (2015) and just leased a Gen 2 for my wife. The Gen 2 wind buffeting seems to be worse than I recall it being on my Gen 1. I called Chevy to find out if a service alert has been issued for the Gen 2's and was told there is none.

Does anyone have any information on whether they may issue a service alert or not?
Sadly, you're note the only one with this wind buffeting issue. Every time I try to get some wind to draw from a front to a rear window (be it same side or diagonal) I get wind buffeting. This happens at 35+ mph. Only decent config for some wind was having both front windows open by an inch or two. There some buffeting, but it's tolerable.
 

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I remembered I captured a photo of this vent in a photo I took of my 03 Z06 when I was installing DynaMat. You can clearly see it in the left side. It was there on my 06 and 07 vette's too.
 

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There are two air vents behind the battery that exit in the area ahead of the bumper fascia. They have rubber flappers in them. Tried to post the picture from the Service manual but no joy.
 

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There are two air vents behind the battery that exit in the area ahead of the bumper fascia. They have rubber flappers in them. Tried to post the picture from the Service manual but no joy.
Haven't noticed those vents. I wonder if they're powered in some way or don't actually vent the cabin.

I'm sure many recall the first few days of owning their Gen2 when they were concerned that there was something wrong without the hatch because they had to slam it shut unless the passenger does it Windows were open. Several of us posted it showed to be an air cushion thing from the cabin being so airtight.

That suggests to me that there is no significant venting of the cabin. A vent large enough to address high speed wind buffeting from open windows as discussed here would certainly be enough vent to let the hatch shut without slamming it. Either that or the whole hatch theory was wrong.

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