2015 YUKON NOISE IN CABIN

ajs800 · October 15, 2015

Interesting.....I experience a ton of body booming at slower speeds on rough roads. I notice little or zero booming on the same roads under hard acceleration (i.e. when accelerating from a stop sign or traffic signal).

The hard acceleration makes the truck "squat" in the rear and loads the rear suspension. The weight of your boat and trailer do something similar. I do think the rear suspension is part of this issue.

I installed OEM cross rails last week hoping to eliminate the buffeting and no such luck. My latest plan is find a leftover 15 or a 16 that doesn't have the problem(if such exist) and trade in or go back to a pre 15 burb or denali XL.

I've had several conversations with high level gm rep and local serv mgr and have told them I'm not having it looked at until they can confirm a fix.

The GM customer serv rep is supposed to talk to engineering to see if they are still working on a fix or not.

The Zip · October 15, 2015

A family member of mine has an early build 15 XL SLT (identical options as mine with only diff being 20 vs 22 wheels) and it does not have the pressure issue.

I didn't think the roof racks would factor in with changing the set-up, but if you were in an identical truck with no pressure, change out the wheels? If your dealer is working with you, tell them to pull a truck off the lot with 20 inch wheels, change them out, and see how that affects your set-up. Why not?

...I'm not having it looked at until they can confirm a fix.

The parts being replaced are not defective or broken. I don't see a fix by changing them with the same parts?

yahtzee · October 15, 2015

Still looking for owners in LA, Las Vegas or Detroit so we can get some additional attention to these problems. Anyone?

wesd · October 15, 2015

I completely agree. Been driving a 2015 Yukon SLT from Hertz for two days now. No booming or buffeting and it's a pretty sweet ride. Should put about 1500 miles on it over the next few days so I'll write up a report with my final observations - but so far, so good.

FogDucker · October 16, 2015

My Yukon was at the dealership today. They pico-metered it and started with road force balancing the tires. Two were off by a lot, but this alone has not had any change with the boom.

Can those with the issue kindly try something: have someone else drive and sit in the 2nd or 3rd row and report back if you hear the boom? It's important that those familiar with the sound try to listen for it.

--

Marc

yahtzee · October 16, 2015

My Yukon was at the dealership today. They pico-metered it and started with road force balancing the tires. Two were off by a lot, but this alone has not had any change with the boom.

Can those with the issue kindly try something: have someone else drive and sit in the 2nd or 3rd row and report back if you hear the boom? It's important that those familiar with the sound try to listen for it.

--

Marc

Yes to both. I also hear it with all four windows down. '16 XL Denali.

16Denaliguy · October 16, 2015

Same interstate this past weekend @ 70 mph and had the wife drive while I sat in different seating positions:

drivers seat - buffeting, air/ear pressure - unpleasant

Passenger seat - not as much buffeting and air/ear pressure as in the drivers seat

2nd row drivers side - no buffeting or air/ear pressure - nice ride wish I could drive it from here.

2nd row passenger side - no buffeting or air/ear pressure

The whole vehicle tremors or shimmies the whole time doesn't matter if the road is smooth or rough this is after the rear tires have been replaced 3 times and or road force balanced.

Removed the OEM side window vent shades thinking maybe the buffeting is coming from them. No difference.

FogDucker · October 16, 2015

Same interstate this past weekend @ 70 mph and had the wife drive while I sat in different seating positions:

drivers seat - buffeting, air/ear pressure - unpleasant

Passenger seat - not as much buffeting and air/ear pressure as in the drivers seat

2nd row drivers side - no buffeting or air/ear pressure - nice ride wish I could drive it from here.

2nd row passenger side - no buffeting or air/ear pressure

The whole vehicle tremors or shimmies the whole time doesn't matter if the road is smooth or rough this is after the rear tires have been replaced 3 times and or road force balanced.

Removed the OEM side window vent shades thinking maybe the buffeting is coming from them. No difference.

Same here!

Could this be an acoustical or mechanical (wheels, ring/pinion, drive) problem?

--

Marc

Wrench589 · October 16, 2015

Same interstate this past weekend @ 70 mph and had the wife drive while I sat in different seating positions:

drivers seat - buffeting, air/ear pressure - unpleasant

Passenger seat - not as much buffeting and air/ear pressure as in the drivers seat

2nd row drivers side - no buffeting or air/ear pressure - nice ride wish I could drive it from here.

2nd row passenger side - no buffeting or air/ear pressure

The whole vehicle tremors or shimmies the whole time doesn't matter if the road is smooth or rough this is after the rear tires have been replaced 3 times and or road force balanced.

Removed the OEM side window vent shades thinking maybe the buffeting is coming from them. No difference.

Your comment about the whole vehicle "tremors or shimmies" is exactly what mine does. I think of it as a shudder, but the more I read about "smooth road shake" the more I realize that is exactly it and how the industry describes it. It appears these vehicles have the absolute worst case of smooth road shake. Google it, and you can spend all night reading about.

Now, I also find it interesting that when Ford introduced their all new F150 in 2004, there are tons of complaints of vibration and visible shaking/jiggling of the box at highway speeds. And, this was the new platform that had all the latest technology - boxed frame rails, hydraulic body mounts, blah blah. Bottom line - stiffer frame and body. Looks like that means more "smooth road shake".

I fear there is no "fix". These vehicle are suceptible to the most minute disturbances from road or slight unbalance in tires, wheels, axles, driveshafts - whatever - they can't make those part perfect. And the result - some amount of Shake and shudder, and ultimately buffeting.

Boy, I hope GM proves me wrong. But until they find the smoking gun, it's all just BS.

FogDucker · October 16, 2015

I'm following OmahaBen's lastest report with great interest. It's unclear if he had "the boom" in addition to the vibration. Maybe the vibration manifests itself differently in our SUV-type trucks vs. the pickups, but the root cause [vibration] is the same?

@wrench - "smooth road shake" articles describe our issue accurately! Does anyone know what kind of body mounts our trucks use and if they changed from the previous generation?

--

Marc

sas06 · October 16, 2015

I am in Saudi Arabia. Bought a Suburban 2015 a few weeks ago. It had horrible vibrations and buffeting noise in cabin. Went back to the dealers and they said the tires need changing. Originally it had Bridgestone tires and they replaced with Pirelli and balanced them. There was huge improvement. The horrible vibrations went away but the buffeting sound is still there, although the sound has reduced somewhat considerably and is far less horrible. One more thing is that I feel ripples going through the body and steering wheel from tiny imperfections on the road. Once I was driving on a newly constructed carpeted and extremely smooth road, and as soon as I got on it all the noise and ripples went away. As soon as I got off they came back. So the buffeting is definitely from some kind of vibrations. I would appreciate if someone could tell what can fix it or reduce it further. My hunch is that the ripples in body could be from drive shaft. A mechanic at the dealer told me it is due to larger wheel sizes. However, I must say that driving long on this car is far less tiring than driving on my 2013 Tahoe, except that one has to bear the noise. So in some ways I love the car also. I have noticed also that slightly reducing the air pressure in tires seems to help in noise reduction but not a lot.... cheers!

ajs800 · October 17, 2015

I will say the buffeting is noticeable in passenger seat but maybe not as bad as drivers seat. And It is definitely less noticeable in 2nd row but still there.

I also don't believe the buffeting is suspension related as it is very much prevalent when on on a smooth surface and at specific speeds. Upper 30s / 40s mph is when it's unbearable. I suppose there could be driveline issues that are transferred through cabin at certain speeds but it doesn't feel that way.

However, the booming noise may very well be suspension related.

Cl Houn · October 17, 2015

Did no one do the picoscope and ring and pinion adjustments? I thought these issues was resolved with this update

sas06 · October 18, 2015

I plan to show this post (http://www.gm-trucks.com/forums/topic/153186-shake-or-vibration-issues/?p=1696430) to the dealership and see if they can do picoscope and ring and pinion adjustments. Will probably take a while but will report back. Car has to be sent to a different city for body work.

likeschevy · October 18, 2015

techlink has all the online classes that show how the techs are supposed to diagnose the problem with vibration the march 10th 2015 issue deals with part two the driveline etc they are aware of the problem. IN the end if the tech can not resolve the problem with spacers they say just replace ring and pinion gear. That is after they have elminated the tire as the cause. I couldnt get the page to copy.

Just google gm techlink then go to archives and click march 2015 scroll down to vibration analysis this may have already been posted