2015 YUKON NOISE IN CABIN

yahtzee · November 9, 2015

Dropped my XL Denali back at dealer today. Before I left I drove another Yukon Denali (non-XL). Same identical issues. I was given a 2016 Tahoe for my loaner and (shocking, I know) but it has same issues as well. They are going to try some 20" wheels on it but neither of us are convinced that will change much. Also putting them in touch with Frank's dealer about the roof bows and Dynamite. I am closing in on just handing it back to dealer and moving away from GM, unfortunately. I really like the truck but this is not what any of us signed up for. I have no clue what I will be going for but I guess it's time to start searching again.

FogDucker · November 9, 2015

My Yukon has a date with a field engineer on Wednesday. I'm going to have my dealership road force balance my "snow shoes" and put them on.

The fact that my stock 20's were road force balanced without any change doesn't lead to to believe I'll see any improvement. I do recall reading an earlier post where simply rotating the wheel helped. Maybe that's a factor between the shakers and non-shakers?

Elripster · November 9, 2015

FogDucker, are you experience vibrations, buffeting, or both?

Frank

Wrench589 · November 10, 2015

Elripster... Did you say that you've had the TSB to re-attach the roof skin to the cross-bows done twice? The reason I ask is that one of my fundamental concerns with the TSB in the first place is that if the roof detaches from the cross bows from the factory, what makes GM believe it will stay attached after the repair? The repair does not do anything better than the original - it's basically glued at the factory and it's basically glued in the repair. The only difference is that if the gap exceeds a certain amount (cant recall the exact amount), the they are supposed to jam some foam strips in there to take it up and then glue it all together. Well, how well is that really going to work?

I would love to pull my headliner off again and see if it's all popped off again. I suspect it has. And, if there was at least one other person that reports the repair failed, I could use that to get the dealer to get GM to approve pulling it off again.

FogDucker · November 10, 2015

FogDucker, are you experience vibrations, buffeting, or both?

Frank

Both. It feels like the buffeting is caused by vibration. Especially at ~60kph and ~115kph. And the booming sound when going over bumps.

Other than that, I'm really enjoying the vehicle.

There has to be a fix!

Zig10 · November 10, 2015

Elripster... Did you say that you've had the TSB to re-attach the roof skin to the cross-bows done twice? The reason I ask is that one of my fundamental concerns with the TSB in the first place is that if the roof detaches from the cross bows from the factory, what makes GM believe it will stay attached after the repair? The repair does not do anything better than the original - it's basically glued at the factory and it's basically glued in the repair. The only difference is that if the gap exceeds a certain amount (cant recall the exact amount), the they are supposed to jam some foam strips in there to take it up and then glue it all together. Well, how well is that really going to work?

I would love to pull my headliner off again and see if it's all popped off again. I suspect it has. And, if there was at least one other person that reports the repair failed, I could use that to get the dealer to get GM to approve pulling it off again.

If it was done properly, I would imagine it would hold pretty well. Filling the gap in between the spaces alone should keep the roof from flexing as much simply because the contact points limit the reactive length of the panel. The glue would be under less stress, and it should all work as designed... Of course, it should all have worked as designed from the FACTORY, so take it all with a grain of salt.

I think it is a bit unreasonable to expect mechanics to be doing body panel work and get it right, especially when the assembly line can't keep the tolerances that are required BEFORE any of the electrical and HVAC equipment goes into the roof area. It's got to be a complete PIA working up there after the fact.

Well, fingers crossed. Mine goes in this morning...

Elripster · November 10, 2015

Elripster... Did you say that you've had the TSB to re-attach the roof skin to the cross-bows done twice? The reason I ask is that one of my fundamental concerns with the TSB in the first place is that if the roof detaches from the cross bows from the factory, what makes GM believe it will stay attached after the repair? The repair does not do anything better than the original - it's basically glued at the factory and it's basically glued in the repair. The only difference is that if the gap exceeds a certain amount (cant recall the exact amount), the they are supposed to jam some foam strips in there to take it up and then glue it all together. Well, how well is that really going to work?

I would love to pull my headliner off again and see if it's all popped off again. I suspect it has. And, if there was at least one other person that reports the repair failed, I could use that to get the dealer to get GM to approve pulling it off again.

Mine was done 2x because only the most forward bow was attached initially.

In my opinion, the repair can hold just fine if the foam stuff between the bows and roof is in compression between the two and held from slipping out of place by the glue. The glue will work for that but I cannot see it bonding metal together for any length of time if the metal surfaces are pulling themselves apart.

You don't need to pull the headliner to see if the roof separated. Just bang on the roof and watch how it vibrates. If there is a huge vibrating swath of metal it is floating freely. If that doesn't convince the dealer, have them pull the headliner and drive it so they physically watch the roof move. Seeing is believing.

Frank

Elripster · November 10, 2015

Both. It feels like the buffeting is caused by vibration. Especially at ~60kph and ~115kph. And the booming sound when going over bumps.

Other than that, I'm really enjoying the vehicle.

There has to be a fix!

The smaller rims might help a little but I'd say you need to get the roof fixed first. At the end of the day there will always be some disturbance that will make the truck vibrate as do all vehicles. I think the goal here is to make the truck tolerant to such disturbances much like other vehicles. Otherwise, one is likely to chase unicorn-grade car parts forever.

Frank

ajs800 · November 10, 2015

Elripster... Did you say that you've had the TSB to re-attach the roof skin to the cross-bows done twice? The reason I ask is that one of my fundamental concerns with the TSB in the first place is that if the roof detaches from the cross bows from the factory, what makes GM believe it will stay attached after the repair? The repair does not do anything better than the original - it's basically glued at the factory and it's basically glued in the repair. The only difference is that if the gap exceeds a certain amount (cant recall the exact amount), the they are supposed to jam some foam strips in there to take it up and then glue it all together. Well, how well is that really going to work?

I would love to pull my headliner off again and see if it's all popped off again. I suspect it has. And, if there was at least one other person that reports the repair failed, I could use that to get the dealer to get GM to approve pulling it off again.

Who's to say the laser welding or spot welding / bonding method (not sure what method is used by GM) at factory is not the issue? Maybe there is a bad batch of roof bows/sheet metal roofing that doesn't mate well when assembling? With that said, I wonder if Frank's dealer used something different or additional to what is outlined in the GM bulletin?

I am in the process of scheduling a body shop to due the roof bow bulletin as well as the dynamating. I'm not so sure I'd feel comfortable having a general mechanic tear into the liner. A body shop tends to have a lot more experience dealing with similar repairs. My dealer recommended that their body shop handles it.

Edited November 10, 2015 by ajs800

FogDucker · November 10, 2015

The smaller rims might help a little but I'd say you need to get the roof fixed first. At the end of the day there will always be some disturbance that will make the truck vibrate as do all vehicles. I think the goal here is to make the truck tolerant to such disturbances much like other vehicles. Otherwise, one is likely to chase unicorn-grade car parts forever.

Frank

My Yukon has the stock 20" Denali rims. My winter shoes will be the same size.

Some disturbance is fine, yes. I shouldn't be able to feel it in the steering wheel or seats, let alone hear it.

Chris M. · November 10, 2015

Since the TSB came out so long ago (summer 2014?), is there any indication the 2016s are being delivered with the roof bow issue already addressed? Based on people reporting issues with 2016s it either isn't being addressed or that isn't what's causing the problems.

Cl Houn · November 10, 2015

Since the TSB came out so long ago (summer 2014?), is there any indication the 2016s are being delivered with the roof bow issue already addressed? Based on people reporting issues with 2016s it either isn't being addressed or that isn't what's causing the problems.

Guess we find this out when people get results this week from tsb, wouldn't put it pass the dealer that they would rather it not be fixed on 2016s so they can service it and make they money

boazEarl8 · November 10, 2015

Since the TSB came out so long ago (summer 2014?), is there any indication the 2016s are being delivered with the roof bow issue already addressed? Based on people reporting issues with 2016s it either isn't being addressed or that isn't what's causing the problems.

Pretty sure not being applied, or if they are then the bows come undone quickly

Have been test driving lots of 2016s, most have the buffeting just in varying amounts

Sammy19 · November 10, 2015

Stop buying any 2015 and 2016 Yukon,Suburbans and Tahoes. If you already did purchase one then give it back, too many problems and there is no fix that Gm can offer especially with the wind noise in the cabin that is annoying and hurting my ears and major booming and vibration feelings. I have a 2015 Yukon XL SLT purchased at $85,000 on the road, not even worth that price. All of the parts on these new model SUV's are cheap quality exterior parts and will eventually start falling off like mine at 25,000km.Stay away from these 2015 and 2016 models untill GM solves the issues.

Willyspu · November 11, 2015

(I have read this thread from the beginning . . . right after I ordered a 2016 Suburban with exactly what I wanted. I waited 2 months and researched this and other issues as much as I could.)

Just picked up the 2016 Suburban we ordered in September. Before accepting the car I discussed the issues in this thread with the sales person and asked to meet the service manager and discussed the issue with him. While the sales guy was not familiar with the problem, the service manager knew about it and had worked on several vehicles. I had a copy of the #PIT5318 bulletin from 2014 and showed it too the service manager. He said there was an update in July of 2015 and printed out a copy for me, it is now #PIT5318B. The service manager said GM is very aware of the issue and is trying to fix the problem as cars are produced and GM supports the dealers to help customers. I know . . . this may only be lip service but at least he did not deny it and was willing to acknowledge there was a problem.

After the talk I drove with the sales person for about 30 minutes. I told him I would not accept the car without a extensive test drive. Believe me when I say we tried a huge variety of roads. We went on rough roads, smooth roads, close to other cars at 70mph and away from cars at 70mph, slow speeds and over rumble strips and speed bumps. At several points I held my hand to the roof to feel how much it vibrated.

The result was that at the 40-50 speed I could feel some pressure in my ears but not too much to be uncomfortable. I did feel some what I call "road feel" vibration coming into the steering wheel and body but not like a part was out of alignment somewhere. It is not as smooth or quiet as my in-laws 2015 S Class Mercedes but this is basically a dolled up Chevy truck. I will say, I don't care fro the V4 to V8 switch or the lag in response from the gas pedal.

So, the 2016 Suburban is now in my possession. Hopefully, the car will be as dependable as my 2002. I will keep the group updated if things change.

I tried to scan the #PIT5318B dated 7/30/2015 but the scan was too large. The wording can be found on a previous post on this thread, here http://www.gm-trucks.com/forums/topic/162779-2015-yukon-noise-in-cabin/page-74

For the record my 2016 Suburban was assembled in early October 2016

LS Model

Luxury Package

Second Row bucket Seats

MyLink

Roof Rack Cross Rails

Transfer Case 2 speed

18" Wheels