ateam_burb

@Ozzii, can you ask your dealer for a reference to information on the new exhaust components? I'd like to get my dealer on-board with getting the parts ASAP.

ajs, there is a TSB for the rough ride if equipped with the magnetic ride suspension. My Suburban LTZ had the same issue and following the TSB my dealer replaced some of the suspension components (shocks and struts I think). It made a significant difference in the harshness over bumps. Yes, the feel is more disconnected from the road but it's a land yacht, not a sports car, so it works for me. Mine is a 2015i, and I was told the updated parts are standard on the 2016 models.

Hello All. Can someone who has had their vehicle recently serviced for the buffeting either post or PM me the latest service bulletin number their dealer is working off?

@jeeps, that is interesting. Can you tell me what the flaps actually look like or post some pictures? Sent from my Nexus 5 using Tapatalk

I think he meant from inside the cabin. If so, I don't think there is such a button for just the glass, only the entire tailgate.

Did they offer you a loaner? Check your State's Lemon Laws, as that may impact the number of days and/or eligibility.

Most of what has been posted points to GM thinking this is a vibration issue. Based on my experience, I agree. Just search my posts here and you'll see I was able to reproduce the pressure and buffetting at low speeds by exciting the chassis. I started off with the buffetting at 39 MPH but it would occur at other speeds too. BTW, replacing the entire rear end practically eliminated it at 39 MPH but as I said it reared it's ugly head at other speeds. I would assume GM knows this is a real I issue but is quietly sweeping it under the rug, well, because they can. My bet is that the 2016's will not have this issue (or it will be less noticeable) but we'll have to wait and see.

2015 Suburban LT with the same "pop" occasionally in the driver's seat. About 4,000 miles but it's been doing it since 750. I never did anything about it but wanted to chime in as it's clearly not an isolated issue.

I need to look at the TSB again but have to ask why glue is being used at the factory. Isn't it metal on metal? Why aren't they welded if that is the case? Good info on the dynamat, thanks.

Mine had buffetting with the max trailering package, yes.

I second that request for part numbers if the ride is that much better.

I too am encouraged about the new new shocks and smoother ride. Is your Escalade the long model or regular length? Buffeting seems more common in the longer models. Was it diminished at all after the new new shocks?

All of these fixes, at least what I can surmise, target one main factor - vibration. So what happens when a tire gets out of balance again? I am not convinced any of these fixes will last long term. In my opinion, something in the design needs to be changed. I'm hoping we hear more stories of newer builds not exhibiting the issues but for existing owners with earlier builds I don't see much in the way of a path to a solid fix so far. Sent from my SM-N910P using Forum Fiend v1.3.2.

@jason, the 4 wheel drive issue appears to be related to colder weather and is a known issue without a fix for some at this time. Check this thread. http://www.gm-trucks.com/forums/topic/169213-4x4-will-not-work/

I've been in the vibration playing a significant role camp since first finding this thread. If I'm not mistaken the suburban, Yukon, escalade all share the same platform with the new Silverado/Sierra introduced with the 2014 model. Just do a search for Silverado vibration and you'll find a bunch threads and videos. I actually drove a 2014 Silverado and it had similar buffeting. Then a buddy got a brand new 2015 and it had zero. They were the same trim level but the difference was night and day. The 2015 drove like a caddy! Sent from my Nexus 5 using Tapatalk

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 ANC may play a part in this but there are vehicles that don't come equipped with it as far as I know. I flat out asked a GM engineer if my 2015 suburban LT had ANC was told it could (or not) but there was no easy way to tell without investigation of the radio and software installed. A post awhile back indicated that perhaps the suspension was too stiff and what some are experiencing is vibration resonating up through the cabin. For my vehicle, I believe this is exactly what happened, and the key word is resonate. As an easy test (with or without a fuse pull or cotton balls) first find a section of road with a nice long row of raised center reflectors, usually spaced a few inches apart from one another. Driving safety comes first so you may want to do this when no other vehicles are around. Stop your vehicle and then slowly drive the driver's side tires over the reflectors, slowly increasing your speed to 5 -10 MPH. Maintain whatever speed you get to when the vibration starts, about 8 MPH from what I experienced. The first thing you'll notice, at least I did, is that after a few seconds the interior of the cabin will shake and vibrate like there's an earthquake inside the vehicle, and the longer you drive the worse it gets. I am NOT exaggerating about the level of vibration here, it feels like the vehicle will shake apart. I would only drive with this shaking only for a number of seconds in fear that the vehicle would be damaged somehow. The second thing you'll notice is the pressure building up and the buffeting sensation reported here in this thread. So, could it be the ANC contributing to this, I don't know, I'll defer to the acoustics experts here and at GM. What I do know is that I've never driven a vehicle that vibrated and shook like this before. I did the same test with other vehicles and yes, you feel bumps in the road, but the steadily increasing vibration and buffeting sensation, no. I drive on mainly smooth roads but I can only imagine the frustration by those with this issue AND with a long gravel driveway or daily drives on less than perfect pavement. I ended up cutting my losses and trading out of this vehicle so as not to deal with the headaches, literally and figuratively. I wish you all the best and hope GM can come up with a fix as the new Suburban/Yukon/Escalade is a fantastic vehicle otherwise.