2015 YUKON NOISE IN CABIN

boazEarl8 · March 7, 2016

Very interesting. About a year ago. Asked if anyone having the buffeting also had the roof rack cross bars installed and at least one person did, so the conclusion seemed to be the cross bars did not help. One thing we did not explore was the ax act position of them. It's totally possible that put in the correct location, they can be helpful in adding some stiffness to help resist the buffeting (assuming it's he roof making the noise, which is still the most likely situation).

Maybe I will pick up a set after all....

Except someone here a few/lot pages back saw no difference with them on or off, and I found the same as I had them removed at delivery ... I did not try them in the other positions

Jbardram · March 7, 2016

Very interesting. About a year ago. Asked if anyone having the buffeting also had the roof rack cross bars installed and at least one person did, so the conclusion seemed to be the cross bars did not help. One thing we did not explore was the ax act position of them. It's totally possible that put in the correct location, they can be helpful in adding some stiffness to help resist the buffeting (assuming it's he roof making the noise, which is still the most likely situation).

Maybe I will pick up a set after all....

Maybe they disrupt the airflow over the roof, which might help, but I don't think they would add any real stiffness. Mine rattled right from the dealer so I took them off and taped the ends before reassembling them. The rails are only held into the brackets by one screw (not fully tightened by dealership) and it is designed to slip on one side so if your roof were flexing I think the rails would as well.

But hey if that really does solve the problem GM has a cheap fix on their hands.

Wrench589 · March 7, 2016

A member on the Cadillac Forums had the exterior roof crossbars installed to carry items, and says it all but eliminated his booming and buffeting.

Except someone here a few/lot pages back saw no difference with them on or off, and I found the same as I had them removed at delivery ... I did not try them in the other positions

I'm going off the comment about someone on the Cadillac forum having a reduction of the buffeting with the installation of the cross bars. I agree it's been discussed many times before and seemed to be of no help, but just wondering about the specific position as a way to explain this report of it helping.

socoyo · March 7, 2016

Had a 2015 LTZ for a few months with approx 11k miles on it. Had the doming/buffeting noise. Have since traded in for the 2016 LTZ and have all the same exact problems as before. The dealership had their head service person take it for a drive and could not believe the issue still existed. Was told the one I traded in was still sitting in the service bay and probably would be for months as GM keeps sending them possible fixes with none working as of yet. The new one, lets just say they buried their heads on top of their desk in disbelief that the same problems were occurring. Waiting to hear whats next.

wiseasp · March 11, 2016

I went to a BBB arbitration Yesterday for my 2015i Escalade ESV. GM agreed to purchase the truck back before the arbitration, but wanted to charge me use mileage for 4800 miles. The truck has 6000 miles and it all started around 700-800 miles.

FYI...MAKE SURE WHEN YOUR SERVICE WRITER, WRITES YOUR REPAIR ORDER IT STATES "ROOF BUFFETING". We had several tickets wrote up with roof buffeting, but the last one was written up with "a drone in the car and it still exists". GM said now that is a whole different problem now... I told them its the same damn thing. They are trying to play on semantics....

The other thing that came up from GM...they stated in our warranty book that came with these vehicles it states that they are NOT responsible for noises in the truck. I will look for it and post the info for everyone. I will have a decision in 3 business days.

Edited March 11, 2016 by wiseasp

Eric cova · March 12, 2016

hi every one, i wanna share my experience from very far away >Saudi Arabia..

i have 2015 sle Yukon and the first day i Purchased it i notes the same issue y'll have (doming/buffeting noise) and( severe vibration )> i went back to the local dealer how understand nothing and complain about it he told me u need a new ties ,they change them for free under warranty but nothing change at all ,went back again he tray it but he told me its normal and he heard nothing he latterly pretend that he herd nothing and the hole car was checking but he insist . so i google that and fond this great site ( thank god) :-) , i read every thing here and try some things on my car and i found that the only thing that helps me a lot is

( reduce tiers presser ) its minimize the (doming/buffeting noise) and( severe vibration ) to 70% on mined keep in mind the road here are so bad,,,i took it done to 30 psi and i recommend it for u guys to give it a try ...

thanks guys and excuse my spelling >>>

Edited March 12, 2016 by Eric cova

Jbardram · March 12, 2016

Wonder how many perfectly good tires GM has changed..

Cl Houn · March 13, 2016

If it turns out to be only the tire pressure this would be crazy. I usually only ran 36psi on my olde denali. What pressure you guys running

Snoringbear · March 14, 2016

If it turns out to be only the tire pressure this would be crazy. I usually only ran 36psi on my olde denali. What pressure you guys running

States 32 psi for all four on the door for my 20015 LTZ 6.2L cc. But, I set them at 30 psi cold. Now that the weather is warming noticed that I'm starting the day at about 31. Will be 32 by April. Anyway, the tiress are usually at 34 ~ 36 after a few miles. So, all is good. But, if you're starting out cold with 36psi, depending on speed driven and outside temp, could be at 40 ~ 42 psi very quickly. Tires juiced that high will transfer lots of road conditions into your veh for sure, regardless of the brand, make, model, etc.

Jbardram · March 14, 2016

Mine came delivered from dealer at 40psi cold. Didn't notice it until first trip when we found the highway expansion joints to be very annoying. Tires were reading 42psi when warm. Dropped it down to 33 cold and had noticeable improvement. Door jam sticker is 35psi for my 18" z71s.

Cl Houn · March 14, 2016

Guys should try the lower pressure. Does make a big diff. Snoring bear you might be right about that psi. I had 23 inch rims on mine and psi was set lower than labeled on tire might of been 30psi. But I know I always dropped pressure lower and it rode better

ChicTrucks · March 17, 2016

I've been following this thread from the beginning and I think the tires contribute to the noise. I drove the suv's in all 3 groups (both sizes) over several months and experienced the same cabin pressure/noise. I didn't drive any 4x4 versions. My husband always insisted we test drive the ones with 22's. I finally found one without problems, so I drove it 300 miles before I bought it. This one had 20's. The sticker said equipped with 22's. We found out the dealer took the factory installed 22's off the Denali and replaced them with 20's. They're Continental CrossContact LX20 Eco+ 275/55/20. The tire pressure was 32-34 in the winter and is 34-35 now. I'm going to have air let out as it warms up.

We later found out the salesperson who took the 22's off my Denali regretted it, b/c it created the noise and pressure problems in his Denali.

I have a sunroof and built-in entertainment system. No noise problems in the cabin and my headliner doesn't move when I close the door.

I have a 2015i with 14,000 miles now. I bought it with 10 miles.

The Zip · March 19, 2016

This one had 20's. The sticker said equipped with 22's. We found out the dealer took the factory installed 22's off the Denali and replaced them with 20's. They're Continental CrossContact LX20 Eco+ 275/55/20. We later found out the salesperson who took the 22's off my Denali regretted it, b/c it created the noise and pressure problems in his Denali.

I don’t know if the 20s are a fix for the noise and pressure, but if that’s what the salesperson thought, he should just change them back to the 20s and find out for sure. FWIW, I have the same tire with concave five spoke factory wheels and mine never had any noise or pressure.

Snoringbear · March 20, 2016

Well, the OD's are the same for the 20 and 22 tires. So, no reprogramming is required when going back and forth. But, having had several GM vehicles over the past thirty years and had vehicles with both dimensions I have learned that 20's are the way to go whether talking ride, wear, cost, you name it.

16Denaliguy · March 20, 2016

My new Denali will be in soon but:

Back from vacation and here are our experiences with 2 Suburbans and a Lincoln Navigator.

We rented a Suburban for a week down in Florida this past week with 2 bad experiences. The first Suburban with less than 5000 miles on it, we had to return to the rental company since the A/C stopped working in the Florida heat. The second suburban we had (15,000 miles on it) for only 2 days when it died at a stop light in 4 lanes of traffic. Started back up but the check engine light came on and when I went to accelerate it bucked and made a loud bang. I let off the gas and stepped back on it since traffic was flying by and it did the same thing, bucked with a loud bang. It was in reduced power mode and we limped a few miles down the highway and into a parking lot. Called the rental company and an hour later they provided a Lincoln Navigator.

After 4 Escalades and 3 Denalis with 4 Avalanches thrown in over the last 10 years or so the Lincoln Navigator was a real surprise! As soon as you get in the seats are plush, even the 3rd row seats according to the wife. We were fully loaded with 6 people and luggage and the V6 - twin turbo engine was sweet. Real impressed with the motor at how it performed fully loaded and running down the highway 75-80 mph.

The ride was nothing short of sensational. Smooth smooth smooth - no buffeting or booming - no pressure sensations - no hard/harsh ride, quiet ride all around with very little road noise. "Luxurious", "plush", quiet ride with plenty of power. I'm impressed for sure.

Back at airport for the return trip home we got back into my Denali and the comments were that we didn't realize how bad the ride was in this if we hadn't ridden in the Navigator.

After the new Denali arrives and depending on the ride we are considering the Navigator for our next vehicle.

Just like to add that the second Suburban suffered from booming, vibrations and buffeting from 62 to 70 mph. Anything below 62 or above 70 mph was just about perfect.

The first Suburban we did not get to drive it enough to experience any issues.

Edited March 20, 2016 by 16Denaliguy