FogDucker

I think that only GM can answer that and they're maintaining radio silence.

Yes, I've observed that too. Worst in drivers seat, better in passenger and hard to hear in 2nd or 3rd row. Difficult to say, but I'd say that all have the potential for the boom. My Yukon has standard 20" wheels and has boomed/buffeted from day 1. The 2015 Suburban LT rental I'm in right now has 22" wheels and sounds no worse than my Yukon. I'd say that the buffeting is very slightly milder. Who knows, it could even be related to the alignment of the wheel when it's mounted as per the vibrating pickup truck thread. [hub centric, studs off center...] It's all speculation at this point - no single thing has produced consistent results.

Or, all are sensitive to vibrations but only some have vibrations. I'd love to have a trained engineer do a thorough side-by-side comparison of a quiet one versus a buffeting one.

It looks like the AutoGuide article is getting noticed... http://www.thetruthaboutcars.com/2015/12/ttac-news-round-full-size-gm-suvs-making-people-sick-2016-sales-look-flat-millennials-buying-everything-now/ "Full-size Chevrolet, GMC, Cadillac SUVs (and their owners) not experiencing good vibrations According to AutoGuide, the Chevrolet Tahoe/Suburban, GMC Yukon and Cadillac Escalade triplets are experiencing some noise, vibration and harshness problems that could be making their owners sick. Some problems have been reported to NHTSA, with one complaint stating: “Pressure, sound and sensation at low to mid range speeds. Creating headache, dizziness and strain.” A technical service bulletin for the problem states the roof panels might not be bonded properly and has issued steps to remedy the issue. However, it seems that some owners still have a problem after the fix is complete, according to the report." Sent from my SM-G925W8 using Tapatalk

The wheels are made in China. My Yukon Denali wheels are and my Sierra AT wheels are, at least. I believe the country of origin is stamped (or cast) on the inside of the wheel. Can't comment about quality.

I found it! It was post #4293 in this thread. @abominable z71: Does this support your findings?

I remember reading, either in this thread or the suv thread, that this had positive results for somebody. Could the randomness of this problem be related to the randomness of how wheels are mounted? Are you going to rotate one at a time or both?

It's also possible that the SUVs and pickups have the same root cause (vibration) and that the symptoms (shaking, booming and/or vibrating) are different. AFAIK, the only difference between the SUVs and pickups is the size/shape of the box on the rear. Sent from my SM-G925W8 using Tapatalk

My replacement axle was delivered to the dealership today - my Yukon is right next to it in the bay and it goes on tomorrow morning. A GM field engineer is scheduled to arrive post-install to scope it and investigate further. I should have it back by the end of the week. Interestingly, I was put into a 2015 Suburban LT rental, rolling on 22s. It had only ~5,000km on the odometer. It exhibited the low speed bump boom and the 70mph buffeting, but both were lower in intensity than my Yukon - almost acceptable. I asked 2 of the rental company drivers if they had ever noticed the boom/buffeting at 70mph, but they did not. Fingers and toes crossed...

Apparently, Canada is treated as an "overseas organization" to GM USA. Detroit is a 3 hour drive from my home! I'd drive there in a heartbeat if it meant resolution. My dealership is actively trying to fix this - they've been great to deal with and I'm going to give them some time to work through the process. My next step is a complete axle replacement which was ordered exactly one month ago. Other than the elephant in the room, the vibration/buffeting issue, GM hit a home run with the new Yukon. I drove up north this weekend for my son's hockey tournament and got just over 21mpg [11L/100km]! That's amazing for a 420hp powered vehicle that weighs nearly 6,000lbs. GM engineers can accomplish all that yet not correct the vibrating/buffeting 18 months into production. That is a damn shame.

I regret buying my 2015i Yukon. I knew about this issue before ordering it and made the erroneous assumption that GM would have addressed this either by the time mine was built [April 2015] or within a year of the first reports of this issue. I have buyers remorse every time I drive my Yukon at highway speeds. I'm aggravated at all the time I've spent with GM Canada, GM USA and my dealership trying to get answers. I regret all the time I've spent on this forum and other forums trying to piece together what the cause of these issues are and who's done what. I'm angered, mostly with myself, that I bought my the most expensive vehicle that I've ever bought knowing that there was a good chance that it was flawed. I disheartened that so many of you are experiencing exactly the same problem and very few have had it fully resolved. I'm disappointed that 2016s exhibit exactly the same problems. Last week, I threw a hail mary and emailed several GM executives that work within the K2XX platform. I did get a phone call, but as soon as they learned that I was from Canada, their tune changed. I have always been adamant about buying North American vehicles. Better service and support I thought. Support local businesses, trades and industries. And here I am with my $70K vibrating/buffeting vehicle with Chinese wheels, a Mexican rear end and deep regret. What a debacle and more importantly, life lesson.

It would be great if you could mention that the Yukons/Tahoes/Suburbans/Escalades have a buffeting issue that may be related to the vibration.

Did they replace your whole rear axle or just the ring/pinion/diff?

A 2016 Yukon owner just made the same observation is this thread: http://www.gm-trucks.com/forums/index.php?/topic/162779-2015-YUKON-NOISE-IN-CABIN Important clue? Sent from my SM-G925W8 using Tapatalk

Somebody in the vibrating truck thread just made the same observation as you. http://www.gm-trucks.com/forums/index.php?/topic/153186-Shake-or-Vibration-Issues If fact, I think this was mentioned before in either of these long running threads. This clue should help an engineer isolated it, no? Please!

Better yet, do this on a dyno so that road surfaces are taken out as a factor.

I'd notice it right away too, at the sweet spot speeds and driving over expansion joints. Ditto on the exhaust drone - that's a distinctly different tone which isn't annoying as hell. If the booming isn't across all vehicles, it's less likely a design flaw and instead defective part(s) or improperly installed parts. Somebody must be able to solve this! I'd love to be able to visually inspect the underside of the truck while it runs at ~65mph.

No. The dealership has road-forced balanced all 4 tires, replaced 2 and we're now waiting for a complete axle replacement. They're after the vibration which can be felt and likely measured with their scope since they approved a new axle.

True. I suppose the other benefit would have been that we'd have more concrete counts of those with the issue. Would we get further with GM if we were to report 1,000 unique VINs that vibrated?

I adjusted the lift gate stops and applied pressure to the glass while the vehicle was being driven at the sweet spot speeds. Not an issue, at least for me. One thing I have noticed that others have early on in this thread is that it seems to have gotten worse with the colder temperatures. We're hovering around the freezing mark these days and it feels like the booming is worse. IMHO, the booming is caused by vibrations in the rear drivetrain. It's the same boom sound that one can hear when driving slowly over expansion joints, curbs or gravel roads - only repeated and only at two speed ranges.

I could whip up an online form that could help us paint a picture. A quick online survey where the link could be shared and everyone could see the results. The next question then is, what information would be relevant/useful? What do y'all think of this: Model Year [2015 or 2016] Model [silverado or Silverado HD or Sierra or Sierra HD or Tahoe or Yukon or Escalade or Suburban or Yukon XL or Escalade ESV] Pickup Wheelbase [regular or extended or crew] Engine [4.3L or 5.3L or 6.2L or 6.0L or 6.6L] Drivetrain [2wd or 4wd] Wheel Size [18" or 20" or 22" or other] Last 6 characters of VIN [textbox] problem [vibration and/or buffeting and/or booming or none] has reported to GM dealership [yes or no] note [free form text box]

Negative. Sunroofs are not a factor.

Does anyone know who the ring/pinion/axle supplier is for Ford?

My Denali has the standard 20" wheels with Continentals and booms/buffets. I'm going to put my new KO2s [275/55/20 mounted on 20" Sierra AT wheels] ahead of the axle replacement to see if that makes a difference.

Sharing an interesting read on another forum [silverado owner]...