2015 YUKON NOISE IN CABIN

FogDucker · December 4, 2015

Has anyone tried to adjust the rear glass yet with ant success

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.

ajs800 · December 4, 2015

Has anyone tried to adjust the rear glass yet with ant success

my rear glass is super tight....and to confirm this, there's no wind noise around glass when moving. And yes I'm dealing with the horrible buffeting/pressure issue.

Edited December 4, 2015 by ajs800

Elripster · December 4, 2015

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.

If the road or, for example unbalanced tires, are inducing the booming, the colder and thus thicker shock fluid will effectively stiffen the suspension's response to sharp inputs and thus excite things like the roof more.

Frank

2011GS · December 4, 2015

This is my first post but I have monitored this forum for the last few months. My 2016 Yukon XL Denali will be going back to the dealer tomorrow through the GM buyback process. We tried to make it work but our Yukon had vibrations and the buffeting to the point where it could not be driven except for short trips. (1800 miles in 4 months) The dealer did successfully road force the tires after going through 6 tires with numbers <5. Still had the vibrations and started the buyback process. Service and salesman were unaware of the issue till I brought it up and showed them this forum. They all felt the vibrations and buffeting. I drove roughly 8-10 other vehicles trying to find a good one only finding one that was acceptable but did not want to take a chance of future problems down the road.(wrong color interior and exterior also) These are great vehicles. It is very unfortunate that they have these issues. Dealer sales and service did go out of the way to help me. I did not have the dealer service department do anymore than the tires. I will drive my new 2016 Sierra 6.2 replacement vehicle until GM decides to reengineer the Yukon.

Cl Houn · December 4, 2015

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.

Did you do the roof test? To see if the bows came loose

FogDucker · December 4, 2015

Did you do the roof test? To see if the bows came loose

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.

Zig10 · December 4, 2015

Well, just got an update from the dealer. After a week of working on it to ensure that the required PI from GM was followed to the letter, the tech drove it this afternoon and the buffetting was still there at 40-45. They did say that the issue at 65-70 was gone, but that was never as bad to begin with.

I am so disgusted right now it is not even funny.

Edited December 4, 2015 by Zig10

Cl Houn · December 4, 2015

Well, just got an update from the dealer. After a week of working on it to ensure that the required PI from GM was followed to the letter, the tech drove it this afternoon and the buffetting was still there at 40-45. They did say that the issue at 65-70 was gone, but that was never as bad to begin with.

I am so disgusted right now it is not even funny.

Did that include the roof ?

Zig10 · December 4, 2015

Did that include the roof ?

Yup.

Elripster · December 4, 2015

Yup.

That drone at 45MPH is likely due to the engine's control strategy that upshifts to the tallest gear, switches to V4 mode, and lugs the engine at 1000-1050RPM. Fuel economy is outstanding but the lugging engine makes the vehicle drone. I do not think this is an exhaust issue. I think GM will need to design a more insulative engine mount or change the strategy to shift up a gear and the engine spinning a little faster.

Frank

Zig10 · December 5, 2015

The drone was a separate sound, and one I am familiar and ok with. One of my business partners bought a new Tahoe about 2 days before I got my Yukon. I drove his against mine back-to-back to see if the buffetting was there. His was fine. There was some drone in 4 cylinder mode, but no pressure sensation at all.

Cl Houn · December 5, 2015

The drone was a separate sound, and one I am familiar and ok with. One of my business partners bought a new Tahoe about 2 days before I got my Yukon. I drove his against mine back-to-back to see if the buffetting was there. His was fine. There was some drone in 4 cylinder mode, but no pressure sensation at all.

When test driving how long would it take before you notice this problem, is it right away?

FogDucker · December 5, 2015

When test driving how long would it take before you notice this problem, is it right away?

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.

Zig10 · December 5, 2015

When test driving how long would it take before you notice this problem, is it right away?

Within about 10 seconds of hitting 40-45. Normally it's jsu an annoyance, but if you have a cold with any kind of sinus pressure it becomes pain-inducing in your ears...or at least in mine. My family has been passing around a head cold for the past 20 days or so, and I haven't been able to drive that car for more than a 5 minute trip to the store and back.

The loaner they gave me is a base-model V6 Sierra SLE pickup. It drives pretty poorly and doesn't have enough power to get out of it's own way, but no pressure issues of vibrations of any kind.

Sad that I am making payments on a $70k vehicle, stuck driving a $45k vehicle, and somehow this is a better driving experience. How in the hell does GM think that this is acceptable in any way?

Zig10 · December 5, 2015

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.

Anybody got a GoPro and a good magnet?