2015 YUKON NOISE IN CABIN

Wrench589 · January 18, 2015

All - my recommendations are for buffeting only, this is all I was working on since my truck does not exibit anything associated with this thread.

I'm a bit confused. This thread is mainly about the buffeting noise, and the associated pressure sensation. Is that the issue with your vehicle?

The Zip · January 18, 2015

20sierra14 - If the cotton in the mic well is totally safe from a fire hazard, this is a recommendation (based on my research and your testing). I did not think of this during my testing but I like it. Cotton alone won't do it though, the grille must also be mitigated. Or, if the grille is mitigated correctly, cotton may not be necessary. Did you try that. My testing did not require the use of cotton but provided max aesthetics.

The Zip · January 18, 2015

wrench589 - my issue is associated with the "Enhanced Sound" thread, but this thread could benefit. I think the times when I get pressure, their connected. Saying anything associated with this thread was not accurate

Edited January 18, 2015 by The Zip

ateam_burb · January 18, 2015

Based on my experience, the pressure in your ears sensation is most pronounced over rough/gravel roads at low speeds. From my previous posts I was able to recreate the pressure "at will" by finding a stretch of road with some raised reflectors. You could also try the side of a road/highway that has rumble strips. Pull over and stop, drive slowly with your driver's side wheels running over them, increase speed to about 7-12 MPH, and continue to drive at the speed where the pressure/vibration/shaking starts. After a few seconds the vibration and pressure continues to resonate throughout the cabin until it is unbearable.

I don't want to discount that the ANC plays a part here as I agree with most that just sitting in the cabin didn't "feel right." It was a very similar "feel" to wearing noise cancellation headphones on or off a plane. The main difference is that you can just turn OFF the noise cancellation with headphones. It's a shame that there is not an option to disable ANC via the settings menu in these vehicles (or any vehicle for that matter) as it's an not a desirable option for everyone. I would bet real money that disabling would be relatively easy to do in software. Why GM is not offering this option as a potential fix, I don't know, but I would also bet there is some real cost/benefit/risk mitigation analysis going on with certain departments....

The Zip · January 18, 2015

My vehicle - if I didn't have XM, I wouldn't have any pressure at all, I would have never been on this thread. Gravel roads, V8 to V4 transition, tires wheels, and a host of other issues is not present in my vehicle.

Question, with Escalade, Yukon, and Tahoe having the same body and chassis, why is my vehicle different? I understand their will be different options, but generally their the same vehicle. I inferred this a few hundred posts ago

The Zip · January 18, 2015

Let's just talk a couple of glaring differences in my vehicle. For staters, I have a Premium Ride suspension (PRS) versus you guys having the Magnetic Ride suspension (MRS). I started a thread to say how spongy I thought the PRS was and you guys with MRS talk about how stiff, totally opposite. My mics are covered, you guys mics are exposed.

These differences may or may not impact ANC. But my mics may already be in the enclosed position (in essence what 20sierra14 achieved with the tape and cotton balls), can't tell. And my suspension mitigates bumps and road transitions better, you guys suspension probably handles roll better. These 2 differences could impact how ANC performs.

20Sierra14 · January 19, 2015

20sierra14 - If the cotton in the mic well is totally safe from a fire hazard, this is a recommendation (based on my research and your testing). I did not think of this during my testing but I like it. Cotton alone won't do it though, the grille must also be mitigated. Or, if the grille is mitigated correctly, cotton may not be necessary. Did you try that. My testing did not require the use of cotton but provided max aesthetics.

No, the grilles are sitting in the cup holder. There's no way to put 2.5 cotton balls in that space and still re-install the grille -- that's where the masking tape comes into play.. It looks absolutely horrible, but my ears appreciate it.

ateam_burb is heading the right direction! Give us the option of turning ANC ON AND OFF - problem solved, GM isn't having to buy back trucks!

Edited January 19, 2015 by 20Sierra14

Wrench589 · January 19, 2015

Zip, which brand/model do you have?

The Zip · January 19, 2015

You know, with all the research I've done, I think it doesn't matter the brand or model, all are the same, check around (although I have not heard any chatter from base models, they are equipped with the 8 pins versus the 16 pins in the amp. 8 pins does not have ANC). Just because I may not be experiencing something in my vehicle, there may be a different comment from someone with the same brand and model. I believe if the truck has a certain speaker configuration with or without ANC, added to the fact of whether your mics are covered or exposed is a large percentage of the problem. The other percentage will probably be engine size, cabin occupancy, stability of the headliner, extended versus not, etc, etc. Folks are doing what they can, but this issue is way beyond what the customer can figure out and remain within warranty. Just too many dynamics, and that's just for GM and Bose. I have not really dug deep into the XM piece.

I would suggest customers do what they can while remaining within the scope of their warranty in "hopes" that GM issues a fix. I emphasize hope.

The dealer may do more, but what can a customer do to obtain some relief and remain in scope; pull mic pins from fuse 48, or pull mic pins from the amp, or muffle the mics. 20sierra14 chose to muffle the mics, and other than aesthetics, he's loving his truck.

I have a Tahoe LT outfitted like the LTZ with the exception of MRS.

Edited January 19, 2015 by The Zip

Anon2015 · January 19, 2015

2015 Denali and 2015i Denali. Neither with this problem.

The Zip · January 19, 2015

anon2015 - my point exactly

The Zip · January 19, 2015

My preferred option would have been to pull the connection from the mic, at the mic. But don't really know if that would have been an option since I can't get to the mics. That leaves the three above options. The one that would not require experience with pulling pins (you have to be delicate or the pin "catch" will break-off from the "housing") is muffling the mic (mtm). Most folks may not like the mtm option because of how the photos in post 498 looks, or you just may not want to fool around with it. I would have used a variation of the mtm concept but from the photos, not sure of electrical connections in close proximity to the mic when applying cotton. I may not be able to see my mics, but I have seen schematics of the wiring under the headliner.

There is another option, do nothing and just wait on GM or a dealer to figure something out.

20sierra14 - from the photos in post 498, does the grille slide or snap into the housing? Since your grilles are sitting in the cup holder, send me all three. They will be returned, I can't use them. Or check with your GMC dealer for a cost, I may be able to purchase a set, previously they asked for a VIN. You know I didn't ask, I just figured they wanted the VIN from a GMC product. Maybe my VIN will work, if it does, disregard my request.

Edited January 19, 2015 by The Zip

20Sierra14 · January 20, 2015

20sierra14 - from the photos in post 498, does the grille slide or snap into the housing? Since your grilles are sitting in the cup holder, send me all three. They will be returned, I can't use them. Or check with your GMC dealer for a cost, I may be able to purchase a set, previously they asked for a VIN. You know I didn't ask, I just figured they wanted the VIN from a GMC product. Maybe my VIN will work, if it does, disregard my request.

I'll plan on using them once GM gets their crap together! Who knows when that'll be, though!

You seem like a legit guy, I'll just PM you our VIN

Chris M. · January 20, 2015

As another prospective Tahoe/Yukon buyer and 10+ year member of another automotive forum I was doing my due diligence when I found this thread. You guys have done a great job of diagnosing this problem but it is astounding that GM has done basically nothing even after buying back people's vehicles (which they then re-sold??). Having to stuff cotton balls into your $70K vehicle to eliminate an annoying sound is totally unacceptable. I will be paying attention here before deciding whether to go forward with my purchase.

LSUMatt1514 · January 20, 2015

So has the issue been resolved, or is it still a problem? Man I am SOOOO glad that i found this thread. We were looking at purchasing a Yukon Denali within the next month! Unreal that a $70k+ SUV has major design issues!

Matt