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  #1  
Old 02-13-2021, 01:18 AM
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rockpt rockpt is offline
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Default Yukon Denali Wind Buffeting

Went into CarMax today to test drive a 2017 Yukon Denali with 27,000 miles and as I accelerated onto the Interstate there was unmistakable wind buffeting and vibration in the cabin as I reached highway speeds. I had ordered this vehicle shipped up from Memphis to KC and expected a smooth test drive and was ready to buy it until the test drive. I returned home, did more research and learned there's a class action lawsuit pending against GM for trucks/SUVs with 8 speed transmissions, including 2014-17 Yukons, for various issues including buffeting and shaking at highway speeds.

Any thoughts on this issue? I need a large SUV that can tow my 19' Crestliner for long distances. Suggestions?
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  #2  
Old 02-13-2021, 05:03 AM
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gdi gdi is offline
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i have a 15 and have no issues at all. If there is a trans problem have them change the fluid in it. There is an updated fluid that is used to stop the trans shutter. But as far as wind problems I have had no problems.
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Old 02-13-2021, 06:46 AM
vteye3 vteye3 is offline
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Default wind buffering

My .02 I would find another vehicle.
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Old 02-13-2021, 08:19 AM
buckmaster7600 buckmaster7600 is online now
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Even if they do something to stop it you’ll be thinking about it every day. Walk away, you’re paying too much money to not have piece of mind!


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Old 02-13-2021, 10:55 AM
Wall-i-Lama Wall-i-Lama is offline
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Quote:
Originally Posted by rockpt View Post
Went into CarMax today to test drive a 2017 Yukon Denali with 27,000 miles and as I accelerated onto the Interstate there was unmistakable wind buffeting and vibration in the cabin as I reached highway speeds. I had ordered this vehicle shipped up from Memphis to KC and expected a smooth test drive and was ready to buy it until the test drive. I returned home, did more research and learned there's a class action lawsuit pending against GM for trucks/SUVs with 8 speed transmissions, including 2014-17 Yukons, for various issues including buffeting and shaking at highway speeds.

Any thoughts on this issue? I need a large SUV that can tow my 19' Crestliner for long distances. Suggestions?
Test drive an Expedition. I have a 2017 Expedition EL and it tows nicely with a good highway ride. Not luxury, but nice. I've also owned Suburban and Tahoe and I like the Expedition the best. It has the 3.5 Ecoboost and plenty of powe to pull my boat.

I didn't want a truck but still wanted tow and haul capacity. I can load full sheets of 4'x8' plywood and drywall completely inside.

Good luck with your search!
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  #6  
Old 02-13-2021, 02:03 PM
welll
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There was a trany vibration at specific rpm notice on those. Fluid was the issue. Only on Denali and Escalade.

Have them service with the correct fluid (n/c at gm dealer) and re-drive. Likely not a wind issue.
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  #7  
Old 02-13-2021, 02:27 PM
REW REW is offline
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Does this vehicle have an electronic stabilization system installed.
If so, is it functional?

I don't remember the year, but it was my understanding that all larger passenger vehicles after a certain year were supposed to have such a system installed and working.

----
My Son had a Mercedes 423? I believe. It had such a system installed. I had borrowed the vehicle one year to pull my boat to Canada for a fishing trip.

We were driving along just fine and my buddy had reached under the seat, pulled out the owners manual and we were finding out what all of the buttons and lights did in the cabin.

We were driving straight west at the time and I could have been steering with one finger, because the vehicle was so easy to control.

I did have both hands on the wheel and the disable the ECS system button was pushed. Suddenly, I was driving on the left hand lane on the 4 lane road. Then, we came by a grove of trees, that sheltered the vehicle from the wind, and suddenly, I was back in the right hand lane, without really doing anything the steering wheel.

Then, I re enabled the ECS system, and the vehicle instantly calmed down and was virtually impervious to the gusty north wind that was causing the vehicle to swerve when it hit the car with the system disabled.

-------------------------------------
When I check, I find that a 2017 Yukon comes equipped with an ECS system.

-----------
Owner's Manual - GMC Owner Centermy.gmc.com › 2017-gmc-yukon-xl-denali-owners-maual
Yukon/Yukon XL/Denali. Owner's Manual. 2017. Yukon/Yukon XL/Denali ... It is an alphabetical list of what is in the manual and the page number where it can be found. Danger, Warning, and ... outlets can be used to plug in electrical equipment, ... Electronic Stability. Control ... systems come on automatically when the ...
---------------

I wonder if the ECS system was working when you took the vehicle for a test drive.

If it was working, you really should not have been experiencing the symptoms you mention.

However, if the system was not working, it would be normal to have the vehicle exhibit your reported symptoms.

Best wishes.
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Old 02-13-2021, 05:24 PM
twofishy4u twofishy4u is online now
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Sequoia.

the gm 8 speed is quite possibly the worst driving tranny gm has made in the last 30 years
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Old 02-13-2021, 06:13 PM
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Clairebear Clairebear is offline
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You will always be second guessing it, leave it behind and carry on.
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Old 02-13-2021, 11:53 PM
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Thanks for all the comments. I'm not buying the vehicle and will probably get something other than a Yukon. Here's a link describing the issue and as I said, there's a class action lawsuit against GM:

https://www.autoguide.com/auto-news/...-solution.html

It's apparently hit or miss, not an issue with every GM truck and SUV, but definitely an issue with many. Like the article says, it was like driving down the highway with a back window cracked. I didn't even know it was called buffeting until I looked it up.
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