2015 YUKON NOISE IN CABIN

Anon2015 · January 22, 2015

Ccamp5, your story is very interesting and both encouraging (gM knows what the problem is) and discouraging (the only fix is a new vehicle).

I just got back from a 2 hour test drive where I drive the vehicle at various speeds under three conditions; with the microphones taped over, with the tape removed, and with fuse 48, which powers the amplifier, removed. Each run at a given speed was done over the exact same section of road, so this is a very good apples to apples comparison. I used a spectrum analyzer to measure the sound levels at the various frequencies. There are definite low frequency spike in the signature that are likely the "buffeting". I do not see much difference with and without ANC. There is significantly more difference due to varipying road conditions.

I was going to post that I am very convinced the problem is in the roof. As I posted several weeks ago, smack your headliner while inside the back and you will hear/feel the same noise and pressure. And, this makes more sense, since the rougher the road, the more it will excite the roof issue.

Also, I have the same vibration in the vehicle at all speeds. Feel it in the steering wheel and the seat. And, we picked ours up at the end of Oct, so definitely and earlier build.

This is sickening.....

What spectrum analyzer and microphone did you use? Did you record the data and print out the plot?

jasondenali15 · January 22, 2015

Congrats CCamp on the new ride!

**Update** Quick summary: had GM disconnect the ANC and noticed the issue (ear pressure) at lower speeds and had them reconnect the ANC on Tuesday. I swear, the same old ear popping had on my first one (re-purchased by GM) is now back. Upon further review, I am going back to the dealer next week to have him disable the ANC again. After comparing the two (with and without ANC), I would have to say it was better with it disabled.

I would love to just drive my $79k (MSRP) truck down the road without my head pounding and ears popping. Shame GMC for not testing the vehicle better...and even more shame on me for giving them a second chance. My next vehicle will not be made by GM.

Edited January 22, 2015 by jasondenali15

The Zip · January 22, 2015

All - Buffeting and Shake/Vibration (S/V): Anyone with the S/V I am guessing you have wheels larger than 20? If you have wheels 20 or smaller, put them on and assess the S/V and buffeting. (I’m on California’s Central Coast, if someone was near I have a set of brand new GM wheels and tires you could try). I believe if your vehicle has a S/V and you attempt to mitigate buffeting with the 20sierra14 concept, you will not “fully” achieve his results. Reason, your S/V will cause ANC to "compensate noise" more than if there were no S/V. Ironic, the name of the ANC mics are called "noise compensation" and in actually, they are on the job. 20sierra14, do you have a S/V? Regardless if you have S/V with or without buffeting, stuffing 2.5 cotton balls into the mic well and covering with tape will help with buffeting.

As soon as I pick-up some grilles, the plan is to conduct some fabrication and modification in an attempt to achieve 20sierra14’s results without the tape. It will take a little time because I don’t have the actual mic to use as a reference. I do believe I came across mic dimensions during my research, finding the research will speed the process and be a better product.

jasondenali15 - I have a sight picture of what I believe disconnecting ANC means, but what is the dealer explanation of disconnecting ANC. This should be detailed on the work invoice. Is the dealer concept of ANC a master switch, a master mic, a computer shut-off, what? If none of the above, the work invoice should say "disconnect mics at three separate locations"

Edited January 23, 2015 by The Zip

jasondenali15 · January 22, 2015

I did not get an invoice from my first visit...which now raises a red flag for me. He disconnected the one on the passenger side near the door handle. The dealer told me disconnecting a single mic will disable the entire ANC system. Perhaps like a circuit? Like a pulling a single light off a strand off Christmas lights...

Would you recommend I ask him to disconnect all three? I am confident they will do it...just takes a few minutes to do. I appreciate your help! It appears the folks from GM who monitor this site occasionally can care less about this issue.

20Sierra14 · January 22, 2015

20sierra14, do you have a S/V? Regardless if you have S/V with or without buffeting, stuffing 2.5 cotton balls into the mic well and covering with tape will help with buffeting.

Nothing from our's.. Rides perfect, no buffeting, just horrible pressure (w/o the cotton balls)

I did not get an invoice from my first visit...which now raises a red flag for me. He disconnected the one on the passenger side near the door handle. The dealer told me disconnecting a single mic will disable the entire ANC system. Perhaps like a circuit? Like a pulling a single light off a strand off Christmas lights...

Would you recommend I ask him to disconnect all three? I am confident they will do it...just takes a few minutes to do. I appreciate your help! It appears the folks from GM who monitor this site occasionally can care less about this issue.

Most certainly have them disable ALL THREE.. If you just have one disable, it would/should make the system "over-compensate", thus making the pressure worse -- as you stated! It just make sense that it's the ANC creating the pressure! To me, I think it's a "reverb" effect from road noise into the ANC system that's creating the buffeting noise. Just speculation, though.

baddecision · January 22, 2015

WOW! I can't believe I actually found this thread. We bought a 2015 Yukon Denali XL less than 2 months ago. My family can't even ride in it, the noise and vibrations are so bad! At the car lot, I had a problem with how it drove immediately and the car salesman said the road we were test driving on was bad. I took it to another road, and it was still bad. He convinced me to change the tires to Michelin for an extra 600 bucks and that should take care of the problem. Unfortunately I went with the idea. No sooner than I got it home, we all started complaining of the vibrations and the pressure in our ears. My wife got her first ear infection and my 2 year old toddler plugs her ears everytime we get in it and complains. I have headaches after riding more than 20 minutes. I took the car back to the dealership and complained, had to jump through hoops and talk to many different people, and finally they glued to roof down and put some insulation in it. I got the 70,000$ car back with misaligned upholstery and dirt spots on the ceiling. The noise and pressure was still there. I dropped it off again and they said they have done all they can, there is nothing wrong. A field rep got involved and doesn't really acknowledge that there is a problem. I am so fed up and disgusted, I don't know what to do. I dropped it off again this week and some other folks are going to ride in it. Just got a call back and they don't really know what the problem is........who do I turn to? A lawyer? Wait for a fix? I will read back through all the posts, but I just wanted to go ahead and get my story up here.......

The Zip · January 22, 2015

Dealers are slowly beginning to get on board, maybe they are reading this thread. But, if anyone is taking their truck to the dealer for the buffeting issue, be sure to ask what are they going to, what tells them to do it (GM message), and how are they going to get it done (what will it entail). If they decide to disable/disconnect ANC (not sure of appropriate verbiage), respectfully ask they disconnect all three mics. If the request doesn't work, make contact with the lead technician and demand all three mics be disconnected. You just spent 70K, no is not an acceptable answer. Based on info from members on this thread, one being disconnected will not mitigate the buffeting. Although at this point since we have not disconnected all three mics, research versus hard data says this should have some type of positive impact. Be sure to get an invoice for your record and ours.

20sierra14 – I didn’t think you were experiencing S/V. What is your tire size?

The Zip · January 23, 2015

LSUMatt1514 – you are new to the thread but you bring a lot of value. People like me have “paid the money” and laid the foundation of this thread, impossible to get GMs attention. People like you have “not paid the money” and can provide tomorrows input to this thread, will certainly get GMs attention. This is how you and all perspective buyers help us and yourselves; MAKE YOUR POINT, tell the dealer a pre-condition of the purchase of a new Denali will be dependent upon disconnecting/disabling all three mics and showing you the work invoice (don’t look at this as being rude, look at it as being savvy. You are about to drop 70K). You are on the thread so you know what to look for. If the truck “does not” exhibit conditions consistent with this thread, disabling all three mics would be a defining result toward a purchase. Now ensure there is no S/V.

For everyone – disconnecting/disabling ANC is not the fix, if it was, the vehicle would have been designed that way. Regardless of what we come up with on this thread, it is not our intent or responsibility to fix this issue. Our drill is to mitigate the issue at a tolerable level until GM issues a fix.

Edited January 23, 2015 by The Zip

LSUMatt1514 · January 23, 2015

I've already sent this thread to the salesman we worked with when we recently looked at a Yukon Denali. The next morning, he said he spent the whole night reading this thread and was going to talk with his service dept about the issue, but to his knowledge there have been no Yukons come back exhibiting this problem. He said he would do whatever he had to to make us happy. I made it very clear that I was following this thread and GM's resolution of the issue would define whether we went with a GM truck, or stick with Toyota (would love a Land Cruiser but it lacks so many of the bells and whistles the Yukon has).

There is no way that I'm spending $70k+ right now with so many of you having this problem. I have a newborn and a 4 year old...I can't imagine putting them through this torture,nor do my wife and I have time to run back and forth to the dealership trying to get a truck fixed. Hopefully GM resolves this issue soon. It's an absolute shame.

Chris M. · January 23, 2015

There is no way that I'm spending $70k+ right now with so many of you having this problem. I have a newborn and a 4 year old...I can't imagine putting them through this torture,nor do my wife and I have time to run back and forth to the dealership trying to get a truck fixed. Hopefully GM resolves this issue soon. It's an absolute shame.

Me neither. I've wanted a Tahoe or Yukon for many years and have been waiting for this latest version to come out but there's no way I'm buying one when problems like this exist, ESPECIALLY while watching GM do nothing.

The Zip · January 23, 2015

LSUMatt1514 / Chris M - good job. I am sure your dealer is just as respectable as the ones that sold us our vehicles and have the same comment, but to your dealer, it's on. A newborn, 4 yr old, do not buy this truck if it exibits untolerable conditions associated with this thread. Armed with the knowledge of this thread, it would be one of the worst decisions you would have made.

The Zip · January 23, 2015

jasondenali15 - quoting your comment, "The dealer told me disconnecting a single mic will disable the entire ANC system. Perhaps like a circuit? Like a pulling a single light off a strand off Christmas lights". Tobtek had a single mic disabled and the buffeting was worse. Although looking at the wiring diagram could suggest your assessment of the Xmas lights is possible.

It would be good info to know which mic was disabled in both cases, maybe the wrong mic was disabled. What we know, both instances resulted in negative results.

The Zip · January 23, 2015

ChrisM - your comment, "I've wanted a Tahoe or Yukon for many years and have been waiting for this latest version to come out". I am able to mitigate my issue, once we get past this thread, PM me, I'll tell you what these trucks can do.

LSUMatt1514 · January 23, 2015

This may be a stupid question, but I'm assuming there are some Tahoes/Yukons on the road that don't have this issue (in other words there are lemons out there but not all are lemons)? Or...is this a problem with every Tahoe/Yukon, prior to a certain production date, and the issue/phenomenon is just more noticeable to some folks and/or more severe in certain trucks?

I don't recall feeling any weird sensations or hearing any unusual sound when we test drove one. However, I was planning on buying certified preowned and this thread has almost certainly destroyed that idea...