2015 YUKON NOISE IN CABIN

Elripster · February 10, 2016

Well I think everyone who had their bows reattached should make sure the bows are still attached before concluding that attached roof bows still buffet. I would not be surprised if people picked up their trucks, shut the door, and popped off a bow before they even left the lot. My dealer said they applied an exceptional amount of glue in an attempt to keep the bows attached and while they were the buffeting was gone. As I said, as the bows came detached the buffeting returned. Also, I wonder how many interchange booming with buffeting?

Adding mass like Dynamat damps motion but does not stiffen. The added mass requires more energy to get it to oscillate at a given frequency. The hope is that there is not enough energy and thus vibrations are not transferred as noise. All things equal, adding mass reduces the natural frequency. Buffeting is such a low frequency that it stands to reason that the Dynamat has little to no effect as all it could to move the resonant frequency down into the range of buffeting though I suspect the forcing side of the function here (road, wind input) is sufficiently strong as to dwarf the impact of Dynamat.

I completely get automotive NVH. We convert semis to EV's and rest assured drivers hear all sorts of "noises" that bother them but in fact always there, just drowned out by a 12 litre diesel.

Frank

BenYukon · February 11, 2016

Dealer called me regarding the suburban z71 i posted about a couple months back. Now how bonus cash on the hood and lease deal is pretty attractive. I was convinced to wait for the '17s to hopefully benefit from both the 8spd and a production fix for the issues many of you have been dealing with, but this is tempting me. Really struggling with what to expect ... seems from your experiences that a high percentage of these suv's are affected, but given the sales numbers and relatively low number of complaints online I am thinking of rolling the dice..

I would wait for the fix and the 8-speed, it will be a lot more fun to drive ! I am in the same boat and for a 50k over car I really do not want a buffeting noise.

Snoringbear · February 12, 2016

I drive a 2015 Silverado LTZ and I do not have any buffeting or vibration problems. As I've mentioned before, I've been driving Chevy and GMC trucks for forty years and this one is the quietest and smoothest of the bunch. I'm very happy with this truck. But, I did have an interesting experience today that I thought I'd pass along. I was sitting at a traffic light and some kids pulled up beside me with their big woofers and bass speakers going full blast. Being these are low frequency speakers I could actually physically feel the sound up through the seat, steering wheel and could see the hood vibrating. I could not recall experiencing these conditions to this extent in my 2008 Silverado. So, I wondering if the thinner sheet metal on these new trucks and SUVs could be the root cause of these problems?

The Zip · February 12, 2016

I would wait for the fix...

Tires, wheels, motor mounts, body mounts, rear end, roof bows, AFM, ANC, suspension, sheet metal, etc? I don’t know if anyone, to include GM, really knows what’s going on. Haven’t heard any permanent progress from 15 to 16, so that's a huge mountain to climb from 16 to 17. With the hundreds of thousands of trucks on the road not experiencing anything, GM should just give folks their money back ‘cause obviously those trucks have problems. With record Fullsize SUV sales, this is not going to impact GMs bottom line. There is probably less than .01% of these trucks that’s having the problems.

Wrench589 · February 12, 2016

Tires, wheels, motor mounts, body mounts, rear end, roof bows, AFM, ANC, suspension, sheet metal, etc? I don’t know if anyone, to include GM, really knows what’s going on. Haven’t heard any permanent progress from 15 to 16, so that's a huge mountain to climb from 16 to 17. With the hundreds of thousands of trucks on the road not experiencing anything, GM should just give folks their money back ‘cause obviously those trucks have problems. With record Fullsize SUV sales, this is not going to impact GMs bottom line. There is probably less than .01% of these trucks that’s having the problems.

One would think that it's only a small percentage. Yet, many reports of folks with vibrating trucks test driving one after another off the lot and finding they all vibrate. So statistically, hard to believe a ting percentage of vibrating trucks travel around the country together! More likely all the trucks behave fairly similarly and people have different thresholds of perception and when something is bothersome.

Sounds a lot like the buffeting discussions in this thread....

The Zip · February 12, 2016

...many reports of folks with vibrating trucks test driving one after another off the lot and finding they all vibrate.

You make my point about the small percentage of owners experiencing issues. An adult driving vehicles for a while would have experienced driving one without these issues not to know a shaking and vibrating truck. There is a large segment of owners under represented on threads because they are not having problems. Trucks experiencing issues associated with this thread do not provide an acceptable driving experience, especially at the 50K starting price point. After numerous visits to the shop to address repeat shaking and vibration issues, GM should offer owners another truck or refund a very large portion of their money. What good is a warranty without integrity.

NORCAL SS · February 13, 2016

bought a new escalade yesterday and didnt hear anything on my test drive and 400 miles back home nothing really. Then today it started i hear it and pressure in my ear. Taking it to dealer monday.

Does anyone have the actual tsb to this??? or the different tsbs???

I think one said ring and pinion to change out right?? if so im going to ask the gears be changed to 3.42s because i have the big whipple 2.9/meth/headers on their way and want to get it into this truck

Edited February 13, 2016 by NORCAL SS

NORCAL SS · February 14, 2016

good read

The Active Noise Cancellation system is operational under the following conditions:

The amplifier has passed all self-diagnostic checks
All doors are closed
Battery voltage is between 9.5 V and 16 V
The vehicle cabin temperature is less than 140°F (60°C)
Engine speed is between 550 and 3000 RPM

ANC system Diagnostic Tips:

Inspect for any aftermarket audio components. If the audio system has been altered this will cause increased exhaust drone.
inspect for anything inside the truck that may be blocking the speakersand/or microphones.
Inspect for any DTC’s example: B0560, B1277, B127C, B127D, door ajar issues/DTC’s, etc.
Disable the ANC system by removing the AMP fuse. If the exhaust drone noise improves there may be an issue with the ANC system. Some examples of system issues have been: faulty speaker or subwoofer,speaker or subwoofer improperly wired (-/+ wires backward), speaker orsubwoofer inoperative, etc.

The Audio System Diagnostic CD EL-50334-6 contains audio tracks that can be used to test the speakers.

B. Inspect the exhaust system components for the following:

Loose and/or missing fasteners
Heat Shields
Joints and/or couplings: Nuts, bolts, studs, clamps, straps
Bracket and/or insulator mounting
Inadequate clearance to body and/or chassis components
Inspect with the exhaust system both COLD and HOT; in NEUTRAL, FORWARD and REVERSE gears
Improper alignment
Disconnected and/or missing insulators
Cracked, dry-rotted, and/or oil-soaked insulators
Stretched, twisted, broken, torn, and/or collapsed insulators
Bent, twisted, cracked, and/or deformed brackets

Repair and/or replace exhaust system components as indicated by the inspection.

C. Incorrectly seated and/or aligned powertrain components and/or exhaust systemcomponents may create a transfer path into the passenger compartment. Perform the following procedure to re-bed the powertrain/exhaust:

Loosen, but do not remove, all powertrain mounts and exhaust system hangers
Ensure that the exhaust flexible coupling, if equipped, moves freely.
Start the engine.
Settle the powertrain by shifting the transmission from DRIVE to REVERSE.
Place the transmission into NEUTRAL
Turn OFF the ignition
Tighten all of the loosened fasteners with the powertrain in a relaxed position.

D. If after performing the above suggestions and the concern has not been resolved, as a test, swap the exhaust muffler and tail pipe assembly from a known good truck.

If this corrects the concern, order and replace the exhaust muffler and tail pipeassembly.

If the concern is still excessive after performing the above suggestions and the vehicle is equipped with a 5.3L engine, engineering is aware of the issue and working on improvements to the exhaust system

FogDucker · February 14, 2016

Update!

My last report, about 2 weeks ago, was about how my buffeting, booming and vibrating issues were resolved by GM.

Soon after, I brought my BFG K02s mounted on Sierra AT wheels to the dealership for road force balancing. Two came out sub 10lbs. One at 15lbs. One at 18lbs. Since I didn't buy them at the dealership, I had to take it as is. The dealership did report that LT tires also have a 15lb recommended limit.

The tires are awesome. Very slight hum at lower speeds only heard with the radio off. I also noticed that the buffeting returned, very mildly, only at 40mph. Can't wait to get some snow!

I rang up the fellow where I bought the K02s and made the drive out yesterday to see his Hunter Road force balancer. As a tire shop owner, he did emphasize that even 20lb is within spec for an lt tire. He acknowledged that our K2xx trucks may be sensitive. Long story short, we did a lot of spinning. Net result: 12lb, 10lb, 10lb and 9lb. Much less weight usedTwo were replaced as a courtesy. Buffeting is gone again.

I haven't heard any booming at all - I attribute that to the exhaust dampers.

Vibrations gone ever since rear axle was replaced.

Pic of my mounted K02s. (luckily, salt isn't active at -6°F!)

[fixed orientation]

Edited February 14, 2016 by FogDucker

Wrench589 · February 14, 2016

"I haven't heard any booming at all - I attribute that to the exhaust dampers. "

Interesting. My Booming must be different in nature. Mine "booms" when I go over a sharp bump in the road, like a tar strip or a curb transition, and is most noticeable at low speeds. Can literally hear the boom as the tires and suspension hit the bump. In fact, I've been trying to zero in on whether the front suspension or the rear is worse and to be honest, it seems to vary. Over most road jolts, I think the front suspension may make a bigger boom.

I also notice a boom something when I mile the transmission from reverse to drive after backing up, as the slack in the drive line is taken up. That is definitely entering via the rear pinion and suspension.

As for any exhaust boom, haven't experienced that. Perhaps some minor droning, but nothing that is bothersome. But for the record, what was done to the exhaust dampers? And are you talking about the valves in the exhaust system that open under full throttle to reduce restriction in the exhaust?

Another question, Marc, what was done relative to your axle replacement? Front or rear? Just the axles or the entire housing assembly with gears, differential, etc?

FogDucker · February 14, 2016

Yeah, we're talking about the same "boom". Low speed over bumps. Sounds like you're flicking a 12" subwoofer with your finger. It's gone!

I think the physical exhaust system may have been the cause and not the stuff flowing inside of it. When I read 6 "exhaust dampers" on my work order, I assumed the ones shown in the pic below. Harmonic damper? Maybe the exhaust system was bouncing around in ways that it shouldn't have and that was as source of the boom and perhaps also buffeting? Unsure. I am sure that the boom is gone. This does fall in line with section D that Norcal SS just posted.

In regards to the buffeting, there is still the odd hint of it, but it never continues for any period of time. Had the Yukon originally been delivered to me like this, it's likely that I would not notice anything. Still not Buick Enclave quiet, but that's not comparing apples to apples.

The axle replacement was the rear axle, from brake rotor to brake rotor - shipped fully assembled - ring & pinion & all. The symptom that this fixed was the steering wheel vibration. Not the boom. Not the buffeting.

In my opinion, all the new K2xx trucks are more sensitive to vibration. We're all going to have to get to know some good tire people and pay a couple extra bucks to ensure we get a good set. After 8 tire replacements, I've got 2 good sets. Another thing I've learned in the last couple months is that Michelin is the way to go. Checkout all the reviews below about Continental LX20s which came stock on my Yukon below.

For me, the rear end was the cause of my vibrations. The dampers fixed my boom. Good and well balanced tires fixed my buffeting [twice].

2011 Volvo XC60
Vehicle now exhibits a shake at highway speed. I have had the tires balanced twice on a Hunter RoadForce machine. Replaced one of the 'new tires' due to excessive run-out…and sidewall bump. Service tech said he can balance ANYTHING on the Hunter machine…but if it is not perfectly round, it will vibrate and shake on the highway. Really disappointed with Continental.

2010 Toyota Tundra
Vibration and horrible bouncing lead me to have road force measurement test done and results are all 4 tires being out of round.

2011 Ford F150
These are the worst tires i have had on a truck. They are ok on the wifes escape which is why i thought they would be good dor me. They are too thin and get puctures from my gravel driveway and have cause vibration. I dont recommend these for anyone.

2007 Ford Expedition
replaced tires after 2,500 miles, 3 out 4 tires would not stayed balanced. tires were hard and most anoying they had flat spots from sitting even 4 hours in the cold so the first trip cold was thumping down the road.

2010 Hyundai Santa Fe
As soon as I got onto the highway with the Continentals there was a clear vibration and shimmy. Having traveled a couple of hundred kilometers to get the tires while on a trip the Continentals were very disappointing.

2010 Lexus RX 350
I felt vibration on a highway after initial install. Brought tires back again to get re-balanced. Vibration was still there at 75mph. Than took vehicle to different shop to do a road force balance. No luck.I have had the wheels/tires balanced and re-balanced three times due to a vibration issue at highway speeds that has taken all the fun out of driving. Spent hours of time and extra money trying to fix this with no avail. Haven't had any vibration issues with stock Michelins that had to go due to wear. Filed "customer satisfaction" claim with Continental and had all 4 tires replaced under the warranty. Vibration (annoying shivering) was still there. I gave up once got onto highway and finally had tires replaced with Bridgestone Duelers Ecopias 422-vibration has gone and I'm now enjoying the ride. Bottom line - save your time and money and go with something else. I bought these tires after looking at mostly positive reviews. Look at negatives before buying these!!!

2004 Cadillac Escalade
Initially they were ok but they soon developed vibrations and shaking throughout my escalade. After taking them back to the dealer I had install them they informed me, not one, not two, but all four tires are bad. Bad belts causing the tires to be out of round and causing the shaking and vibrating that I am experiencing.

2009 Chevrolet Traverse
Had bad vibration after install, rebalancing didn't correct. Roadforce tested all 4, one was bad. Replaced bad tire but still had vibration and shimy.

1999 Toyota 4runner
Can't get the harmonic vibration out of the tires. Anything over sixty and the steering wheel shakes a 1/4 inch in each direction.

1999 Chevrolet Tahoe
Steering vibrates during highway driving starting at 60mph. It really vibrates when on a highway curve. Forget about it if you happen to be pulling a trailer. I thought there was something wrong with the Tahoe's alignment. Nope. I read reviews and other people have had the same problem with vibration.

2008 Buick Enclave
At 6500 miles I started to have a vibration problem. My tech narrowed it down to mostly one tire. I just got it replaced under warranty (7800 miles) but still have a smaller vibration problem. It seems that many others are experiencing the same problem with these tires, especially when you read the reviews at Continential's own website.

2009 Saturn Outlook
Vehicle vibrates from 40-65 mph after putting on tires, had tires rebalanced twice now and see indentation on the the side wall(belt separation?)on 2 of the 4 tires.

2000 Chevrolet Suburban
Road Force Balancing: Discovered excessive run-out on two tires - replaced by Continental@ no cost. Remaining two tires - run-out w/in acceptable range but required > 60g weight to balance. Very disappointed with Continental's manufacturing controls and quality assurance.

2010 Toyota FJ
Bought these as a wheel/tire set to save stock wheels with mud tires for snow/winter. Drove on the highway for first time and felt like I was driving on marbles. Had them Road Forced again and same vibration. It shakes so bad, it's intolerable and embarrassing when people are in the car.

2013 Volkswagen Touareg
I now have shaking in my steering wheel. I have taken the car back to not just any shop, but the VW dealership that has a road force balancer for tires. I have been in the shop 4 times to rebalance the two front tires and an alignment. All four times I have the same results...shaking in the steering wheel between 55-75 mph. 3 out of the four times they did a road force balance on the tires.

unknown
All 4 tires are out of round but I did not notice for about 13 months. The local roads are not the best. The tire vibrations became noticeably worse during a long road trip so I took the in to get rotated and balanced. Additionally I had a road test done and they were diagnosed as out of round. The seam is coming apart and the vibrations are extreme. They only lasted 12K miles ;(

Mercedes R500
I just put on some Continental 255/50/R19 on my R500. Based on TireRacks reviews and warranty info I got the Continental CrossContact LX20 with EcoPlus Technology... Do NOT get these tires... This set of tires have my car vibrating on the Fwy and humming on the city streets.

Wrench589 · February 15, 2016

Yeah, we're talking about the same "boom". Low speed over bumps. Sounds like you're flicking a 12" subwoofer with your finger. It's gone!

Yea, that's it. OK, so those are the dampers that were installed on your vehicle? That definitely appears to be a highly engineered damper. And absolutely that is the kind of thing used to tune out a specific frequency or set of frequencies. So, if GM has gone so far as to engineer such a device, why TF have they not notified every owner who has complained about booming and had it installed! Jeez! What a bunch of a-holes if they are sitting on this.

Interesting about the steering wheel vibration. Mine had that too. Worse when in 4WD Auto, even on dry roads when in theory, should be in 2WD. Anyhow, when I had the winter tires and wheels put on, the dealer (different one than the one I have been dealing with) did the Transfer Case re-program update and the vibration seems to be gone, even in 4WD Auto. Hope it stays.

And like you, my buffeting is all but gone. There is still that "Jitteriness" / "Jiggle" that the body still seems to have that almost presents itself as a buffet now and again, but very, very minimal. Much better now with the winters on. I expect it to be worse with the original Bridgstone 22" summers. Might push GM to see if I can get them to spring for a set of Michelins come spring.

Glad yours is sorted. Maybe there is hope yet!

FogDucker · February 15, 2016

Yeah, we're talking about the same "boom". Low speed over bumps. Sounds like you're flicking a 12" subwoofer with your finger. It's gone!

Yea, that's it. OK, so those are the dampers that were installed on your vehicle? That definitely appears to be a highly engineered damper. And absolutely that is the kind of thing used to tune out a specific frequency or set of frequencies. So, if GM has gone so far as to engineer such a device, why TF have they not notified every owner who has complained about booming and had it installed! Jeez! What a bunch of a-holes if they are sitting on this.

That was a random picture from the Internet based on what I thought a dampener was and what I observed yesterday while my Yukon was in the air getting the K02s sorted out. I don't know if they added new dampeners or modified the existing ones. I didn't want to get directly underneath it with all the road juice dripping down!

Edited February 15, 2016 by FogDucker

ajs800 · February 15, 2016

Update!

My last report, about 2 weeks ago, was about how my buffeting, booming and vibrating issues were resolved by GM.

Soon after, I brought my BFG K02s mounted on Sierra AT wheels to the dealership for road force balancing. Two came out sub 10lbs. One at 15lbs. One at 18lbs. Since I didn't buy them at the dealership, I had to take it as is. The dealership did report that LT tires also have a 15lb recommended limit.

The tires are awesome. Very slight hum at lower speeds only heard with the radio off. I also noticed that the buffeting returned, very mildly, only at 40mph. Can't wait to get some snow!

I rang up the fellow where I bought the K02s and made the drive out yesterday to see his Hunter Road force balancer. As a tire shop owner, he did emphasize that even 20lb is within spec for an lt tire. He acknowledged that our K2xx trucks may be sensitive. Long story short, we did a lot of spinning. Net result: 12lb, 10lb, 10lb and 9lb. Much less weight usedTwo were replaced as a courtesy. Buffeting is gone again.

I haven't heard any booming at all - I attribute that to the exhaust dampers.

Vibrations gone ever since rear axle was replaced.

Pic of my mounted K02s. (luckily, salt isn't active at -6°F!)

[fixed orientation]

I am definitely realizing that majority of our buffeting issue has got to be tire/vibration related. We are at 30k miles on our xl slt and I've noticed at hwy speeds the front rotors are slightly warped causing pulsating. And of course when they pulsate causing vibrations the buffeting worsens... if it weren't for the braking you'd think it was an airflow issue. Between the junk oem tires, drive-line flaws, and flexible roof, all or one of these can dramatically increase the buffeting to an unpleasant experience. I'm guessing if all of these are in line and correct 99% of folks would not notice anything unusual with these trucks.

Jbardram · February 17, 2016

Despite getting some good advice on here to hold off, I pulled the trigger on a '16 Suburban Z71 Monday. Picked it up, loaded up with wife and 4 kids, two dogs, roof cargo carrier and rear hitch rack and went for 600 mile round trip to Adirondacks in NY. Will post some comments in another thread so as not to clutter this one, but experienced no real symptoms of the issues some of you have had. Truck was very smooth and quiet (we also have a Silverado 2500 gas and an Acadia Denali for comparison). The body does seem very tight, and there was a slight pressure sensation going over some bumps. I was really tuned into it having read this forum and being braced for the worst. No one else in the vehicle noticed anything.

The z71 is somewhat rare in my area. Maybe the wheel/tire combo is a plus, or maybe it has no bearing on whether this eventually suffers from the buffeting/vibration issues. But thanks to all for the feedback last couple of weeks. Hoping for a permanent fix soon for everyone..