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  #11  
Old 02-14-2021, 07:12 AM
Ozark Bob Ozark Bob is offline
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I have had 3 Suburban's. If the back windows are open. There is a very strong vibration. I think caused by the shape of the vehicle. It is a pulsing of pressure in the vehicle. I also had a 90's Jeep Cherokee that did that exact thing. I am surprised the newer shaped vehicles have not remedied that. My burbans were early 2,000's. Still have an 04, just do not open the back windows at speed. Bob
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  #12  
Old 02-14-2021, 07:15 AM
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Not worth it, I’d start the process all over again.
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  #13  
Old 02-14-2021, 08:50 AM
Hot Runr Guy Hot Runr Guy is online now
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Quote:
Originally Posted by rockpt View Post
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.
Amazing that they're tracing some of this vibration and noise back to the roof sheet metal not being properly bonded to the roof bows.

HRG
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  #14  
Old 02-14-2021, 09:05 AM
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Bobby Winds Bobby Winds is offline
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Quote:
Originally Posted by REW View Post
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.
The OP asked about wind buffeting........here's the description of "Wind Buffeting"...... That's wind buffeting, which is described as the turbulent wind pressure experienced while driving at speed. If you're a motorcyclist you might be familiar with it too; a result of the wind coming around a windshield or a fairing, causing your helmet to shake.

After reading what you posted I have a hard time believing ANYTHING you said there so I did some research on the Mercedes vehicle as I have never owned one and here's what I found out:

Mercedes has NO system named ECS per their owners manuals. They have a ECO system but it's just a display of how economical you are actually driving.

Then I went a looked at GM's owners manuals for Yukon/Yukon XL/Denali and they also have NOTHING like a ECS system you mention. They do as MANY manufactures have VSC systems that are Vehicle Stability Control. My 2007 Tundra has this and it's to electronically take over the vehicle to apply brakes and slow engine speed in a spin out.

If you can provide any more facts I'm all ears.
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  #15  
Old 02-14-2021, 09:36 AM
MarkG MarkG is offline
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Might be mistaking "Wind Buffeting" for the ongoing Transmission shutter problem on late model GM trucks. Not sure what current status of this issue and the lawsuit , but it's a good bet there are plenty GM trucks out on the used market with the problem unresolved.

https://www.youtube.com/watch?v=AkoxzNVqblM

https://www.youtube.com/watch?v=cL_Hmcp4yQc

https://www.youtube.com/watch?v=J8nPLRRo1Ps

Last edited by MarkG; 02-14-2021 at 09:48 AM.
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  #16  
Old 02-14-2021, 03:21 PM
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Quote:
Originally Posted by MarkG View Post
Might be mistaking "Wind Buffeting" for the ongoing Transmission shutter problem on late model GM trucks. Not sure what current status of this issue and the lawsuit , but it's a good bet there are plenty GM trucks out on the used market with the problem unresolved.

https://www.youtube.com/watch?v=AkoxzNVqblM

https://www.youtube.com/watch?v=cL_Hmcp4yQc

https://www.youtube.com/watch?v=J8nPLRRo1Ps
I don't know if it's called wind buffeting or what, but this describes it pretty good:

AutoGuide.com was first made aware of the issue when Daryl Watkins, the owner of a 2016 GMC Yukon XL Denali, alerted us by e-mail. “I am the new owner of a 2016 GMC Yukon XL Denali,” Watkins said. “Imagine the sound/feel when a window is cracked riding down the road except it's occurring when all windows are up and at all speeds above 35mph.”

I'm not a car guy, but it seemed like it was more of a structural issue than mechanical. Like HRG said, they're tracing some of this vibration and noise back to the roof sheet metal not being properly bonded to the roof bows. I was set on a Denali, but now I'll look at Expeditions.
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  #17  
Old 02-16-2021, 01:41 AM
REW REW is offline
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Bobby,
Yes, there is an electronic stabilizing system integrated into many high profile vehicles per government regulations.

--------------------
In particular, this is the system to which I was referring when driving my Son's Mercedes as I was pulling my boat with it.

-----------------
https://www.mbusa.com/mercedes/techn...00ccec1e35RCRD

===========
The GM version of this stability system is called "stablitrak"
https://www.autobytel.com/car-owners...ontrol-104048/
=================

The ford system is called the vehicle Stabilisation system.
https://media.ford.com/content/fordm...ech-helps.html

---------------------------
The Toyota high profile stability system is called the "star safety system"
https://www.toyota.com/tundra/featur...8261/8252/8275

A video:
https://www.youtube.com/watch?v=PTaDSvlQvP0

A video of the Toyota VCS (vehicle stability system):
https://www.youtube.com/watch?v=S8roUFxaLS4

-----------------------

This video illustrates the "Original Bosch design which was the one that was first adapted by Mercedes. Then, the similar or same design migrated to other brands of vehicles:

https://www.youtube.com/watch?v=xPxt6Pw00yA

==================================================
I trust that this information helps to clear up any questions you may have about the systems used in today's vehicles.

Last edited by REW; 02-16-2021 at 01:45 AM.
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  #18  
Old 02-16-2021, 05:33 PM
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Different generation, but I had a 2011 Yukon Denali XL that I was never in love with.

We changed to a 2019 Expedition MAX (this is the new body style). It is hands down a better tow vehicle. Very comfortable, and in the 18 months we have had it, has not been back to the dealer for anything other than oil change.

I'm a MOPAR guy, but Ford got this one right. I'd recommend you check it out.
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