2015 YUKON NOISE IN CABIN

[yukontruckman]

FWIW I can confirm this happened to the Yukon Denali we ordered. Truck was built in early October and sent by rail to NJ for trucking to dealer in late October. Then it was sent back to TX and is now on the way back here to the NE.

 

I am not sure if I have the build sheet or something else. It does have the 8 speed but does not have the interim build code on the sheet. I guess I will know more when I see the sticker.

 

If you have a Denali with an 8 speed transmission you 100% have a 2015i build.

[yukontruckman]

Question for those experiencing the problem. Are you hearing an actual noise or is it more the pressure sensation in your ears?

 

I drove a 2015i earlier this week and did not hear a thing. Has me wondering if the truck I drove is OK or I don't know what to listen for.

Edited November 22, 2014 by yukontruckman

[The Zip]

What is "known" based on customer input: Dealers continue to say this is the first they have heard of the issue, hard to believe since these vehicles are coming up on a year being built. Dealers are doing what they can by using engineers, technicians, and mechanics trying multiple fixes (driveshaft/wheels/tires/roof sheet metal/road force balancing) without success and the problem is still happening today, not yet sure if the issue was fixed with the mid year model. The initial problem primarily involved the extended versions driven at speeds between 30-45. Problem gets worse when driving on uneven terrain such as dirt or rocky roads. Vehicles included are all the GM fullsize vehicle line, Tahoe, Yukon, and Escalade. More complaints with the Denali, less with the Escalade, Tahoe somewhere in-between. Headaches caused by the original condition (see post 1 and 2, fournuckles), but are eliminated when not driving the vehicle. Regardless of the version, a few folks on this thread claim not to be having any of these issues.

 

I will continue to research, but out of respect for the folks that are experiencing the problem, I won’t be posting any more about it unless I need to ask a question or have facts or information that may have some relevance on you guys mitigating the issue. I will still monitor the thread, 'cause at any time this could happen to my truck and I need to be up to speed.

Edited November 23, 2014 by The Zip

[bloke1]

My 2015 Tahoe LTZ does the same thing. The buffering sound is attatched to the motor going from 8 to 4 cylinders. When you are crusing between 20 -60mph, let your foot off the guess for 2 seconds. The motor will switch into 4 cylinder mode, gently press accelerator and the noise will appear. I am getting a sqeaking noise also every time I press the accelarator during 20-60 mph, NOT GOOD!!

[FOURKNUCKLES]

As mentioned before, I am sure that it is the v4 to v8 transition. The tech who drove with me, explianed that he thought it was the problem as well, but his hands were tied. We would have kept the vehicle had my kids not refused to ride in it because of the headaches. I'm buying another one once we test drive one with the pressure issue resolved. Sure there are other issues, but this thread was created because of the pressure issue. All new vehicles will have soemthing that someone isn't pleased with. I get that. But when it casues medical concerns, then GMC needs to address it nationwide and correct it. Knocking and minimal cabin noises are just annoying, not something that GMC should worry to much about. The reason this post was started : solely because it was affecting my day to day functioning as a human. A person can only pop so many asprin before we break and "force" a buy back.

[FOURKNUCKLES]

http://cfaa.autoremarketers.com/web/commerce/Item.aspx?ListingId=8887618&EventId=110505

 

Link above is my vehicle. Sold at auction on 11-11-14. Not sure what it means, but GMC is still making money off a vehicle that has issues.....

[Anon2015]

"had the buffering noise and pressure in the ears feeling. One thing we noticed, the worst was in the longer versions."

 

The fact it could manifest itself more in the trucks with greater interior volume and dimensions would be expected.

 

Human sensitivity to low frequency 'sounds' decreases very rapidly as frequency decreases. It is very reasonable to expect some would not "hear" a buffeting sound. By the same token, if the vibration is (a) below your threshold of hearing and (b) of high energy (if you could hear it, it would be very loud), you could feel the change in pressure. This sensation could easily cause discomfort and vestibular disorientation. Sensitive test equipment (not likely in GM's inventory of test toys) could determine the energy and frequency. At those levels, many humans could be insensitive to the entire situation. How it would affect very young children (babies), and pets who cannot communicate their discomfort in ways we cannot fully understand is unknown but could contribute to partial and permanent hearing loss.

 

My Denali is not affected by this problem...which is not to say there isn't a 'nasty' matter betwixt myself and GM with respect to this vehicle. In the end, this problem and mine have common ground. Silence, inaction, denial, and do-nothing-itis on the part of GM. The problem in this thread just happens to be of professional interest to me. (And, to rub salt in the wounds...the Bose system is a disaster, not the premium product you'd expect in a $60k to $90K vehicle, and AudioPilot...a cool idea that simply doesn't work in this environment...and, yes Bose knows it.)

Edited November 23, 2014 by Anon2015

[The Zip]

Bumped into a new member, carz24. Referred them to this thread, below is their first post on another thread;

 

"I just picked up a 2015.5 Denali XL and as soon as I drove it home I noticed a resonance noise that drives my ears crazy. Its a low frequency "drumming" noise that is there at most speeds but gets really noticeable around the 68-75 mph. At its worst it can almost feel to my ears like the buffeting when a rear window is left open".

Edited November 23, 2014 by The Zip

[jasondenali15]

Link above is my vehicle. Sold at auction on 11-11-14. Not sure what it means, but GMC is still making money off a vehicle that has issues.....

 

Sad. Heard GM was going to resell my truck too. The truck literally made everyone sick who drove in it. Did you just search your VIN to confirm?

[jasondenali15]

Bumped into a new member, carz24. Referred them to this thread, below is their first post on another thread;

 

"I just picked up a 2015.5 Denali XL and as soon as I drove it home I noticed a resonance noise that drives my ears crazy. Its a low frequency "drumming" noise that is there at most speeds but gets really noticeable around the 68-75 mph. At its worst it can almost feel to my ears like the buffeting when a rear window is left open".

Oh no...not good.

[TOBTEK]

An update on our SLT Yukon.

 

First time to the dealer it was there about a week. While our dealer here is superb, ours is the first they have encountered with this sound pressure issue. We Desided to wait till GM gets an idea on a cure.

Few weeks went by, I just can't drive this anymore. The sound drives me crazy. So I took it back to our dealer. They put us in a 2015 Yukon XL which is 10x worse then ours. Wow it's bad. Lol, the drivers seat is popping around as well.

With what they have done so far makes me believe GM is still guessing on a cure. First they loosend all the motor mounts so the motor can "settle". They called and said its still doing it. They have obtained sound testing equipment, and are monitoring sound levels when transferring between V4 and V8 modes. They are thinking something is being done with the torque converter?? Maybe some of the issue, but the booming sound over rough road conditions should not be a torque converter issue?? I really think something in the wheel tire combo, shocks, frame or suspension is telescoping this sound up into the cabin. Over cobble stone type roads the booming sound is very noticeable.

It's really Un thinkable that nobody in GM's R&D group didn't experence these issues. Few of our local dealers have new I models. Want to go this week a drive a few to see if their any better yhen ours.

 

Very very disappointed!

[Luvgmc]

Well just to let everyone know i went out a bought a 2014 left over yukon. It is great!!! Just like my old one. I have come to a good conclusion for everyone that is crossing there fingers that the new 2015i isnt going to have the buffering problem. Think of it this way. If GM knew how to fix this problem in the 2015i then they wouldnt be spending all this money tearing everyones viecle apart for an experiment to see if it fixes it. The dealer dont know how to fix it. So until they know then dont order one because it will have the problem. Also for the people that dont hear it. It is there you are just for some reason not hearing it. I brought my inlaws in the viecle and they couldnt hear it. So i think some people just dont notice it. I have been in four yukons and all of them have the problem. So until u can go to the dealer and ask them how the problem was fixed and have a good answer then stop dreaming that GM has fixed it.

[Luvgmc]

Well just to let everyone know i went out a bought a 2014 left over yukon. It is great!!! Just like my old one. I have come to a good conclusion for everyone that is crossing there fingers that the new 2015i isnt going to have the buffering problem. Think of it this way. If GM knew how to fix this problem in the 2015i then they wouldnt be spending all this money tearing everyones viecle apart for an experiment to see if it fixes it. The dealer dont know how to fix it. So until they know then dont order one because it will have the problem. Also for the people that dont hear it. It is there you are just for some reason not hearing it. I brought my inlaws in the viecle and they couldnt hear it. So i think some people just dont notice it. I have been in four yukons and all of them have the problem. So until u can go to the dealer and ask them how the problem was fixed and have a good answer then stop dreaming that GM has fixed it.

[yukontruckman]

Well just to let everyone know i went out a bought a 2014 left over yukon. It is great!!! Just like my old one. I have come to a good conclusion for everyone that is crossing there fingers that the new 2015i isnt going to have the buffering problem. Think of it this way. If GM knew how to fix this problem in the 2015i then they wouldnt be spending all this money tearing everyones viecle apart for an experiment to see if it fixes it. The dealer dont know how to fix it. So until they know then dont order one because it will have the problem. Also for the people that dont hear it. It is there you are just for some reason not hearing it. I brought my inlaws in the viecle and they couldnt hear it. So i think some people just dont notice it. I have been in four yukons and all of them have the problem. So until u can go to the dealer and ask them how the problem was fixed and have a good answer then stop dreaming that GM has fixed it.

 

If a tree falls in a forest and no one is there to hear it.....

 

Jokes aside, I've wondered the same thing myself. That all of these trucks have this issue to some degree, but it occurs at a frequency that some people don't even hear it.

[blackout07]

I saw on another forum that they seemed to track the "wind noise" down to the AC when it's on recirculate. If they are referring to the same issue that is. But FWIW I haven't experienced this issue with our '15 Tahoe.