After 7 months of ownership, I decided to get rid of my '15 Denali >:(

[G00se]

Contact your local dealer about flushing the tranny and reprogramming the software. Ours had similar vibrations (rumble strip feeling.) We had this done last week, it was a service bulletin issued by GMC. It ran about $630 but haven't had any issues since. I'll keep you updated. But I'd look into it for sure!

My dealer said it needs a Torque Converter replacement and software upgrade/reprogram. They did the same thing with two other trucks like mine last week. TC was covered under powertrain, the software was not and quoted me ~$450 to do. They hope to have it done by tomorrow. Then the dealer is gonna try and figure out why this thing rides like F-350.

 

[CMoore711]

I can't believe there are dealers charging to do this transmission service bulletin, for any part of it. The flush, TCM software reprogram, etc.

You should find it very odd that they're willing to cover the replacement Torque Converter under the warranty, but not the software. It's GM's factory TCM software that is being updated with GM's new TCM software in direct response to the transmission service bulletin. When apple releases a software that has bugs gliches or doesn't work right do people pay to update their iPhone software?

My dealer did the entire transmission service bulletin service on mine for free, and didn't charge me a dime.

Those who are getting quoted any $ to perform the transmission service bulletin need to find a new dealer.

 

[petethepug]

AWD eats front tires. Our Audi Does the same. A Bosch AGM battery w/ 4 yr replacement warr and UHP rated rubber cures those issues. Ironically the UHP (W Rated) tires are priced lower, have less body roll, rated higher, last longer and ride better. Figure about a $1h a corner.

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[Obxhoops]

My dealer did the tranny fix for free also on my 2016 Yukon Denali. I described the rumble strip feeling to my service advisor over the phone and he immediately said it's the torque converter. It now drive better than new. Good thing, because it was so bad I was ready to trade it on a new Navigator. They should not charge you.

 

[noob]

Mine is at the shop now, 33k miles, I’m hoping they replace my torque converter. I brought it to the dealer 6 weeks ago, and they just flushed and reprogrammed. So I brought it back when the symptoms started again (was smooth for a month) and hopefully this time it requires replacement. I think warrant ends at 40k miles on my 2017 Escalade

 

[G00se]

My dealer did the tranny fix for free also on my 2016 Yukon Denali. I described the rumble strip feeling to my service advisor over the phone and he immediately said it's the torque converter. It now drive better than new. Good thing, because it was so bad I was ready to trade it on a new Navigator. They should not charge you.

Was your covered under powertrain or bumper to bumper? My dealer said the software upgrade would’ve been covered under bumper to bumper, but I’m past that now. TC is covered under powertrain.

 

[G00se]

Double

 

[2015Denali4WD]

I can't believe there are dealers charging to do this transmission service bulletin, for any part of it. The flush, TCM software reprogram, etc.

You should find it very odd that they're willing to cover the replacement Torque Converter under the warranty, but not the software. It's GM's factory TCM software that is being updated with GM's new TCM software in direct response to the transmission service bulletin. When apple releases a software that has bugs gliches or doesn't work right do people pay to update their iPhone software?

My dealer did the entire transmission service bulletin service on mine for free, and didn't charge me a dime.

Those who are getting quoted any $ to perform the transmission service bulletin need to find a new dealer.

Where is your dealer located where i can get this done for free.

 

[randeez]

I can't believe there are dealers charging to do this transmission service bulletin, for any part of it. The flush, TCM software reprogram, etc.

You should find it very odd that they're willing to cover the replacement Torque Converter under the warranty, but not the software. It's GM's factory TCM software that is being updated with GM's new TCM software in direct response to the transmission service bulletin. When apple releases a software that has bugs gliches or doesn't work right do people pay to update their iPhone software?

My dealer did the entire transmission service bulletin service on mine for free, and didn't charge me a dime.

Those who are getting quoted any $ to perform the transmission service bulletin need to find a new dealer.

x2, tell the dealer keep their software update and you'll just keep coming back for new torque converters covered under powertrain warranty till they update it on their dime

 

[mgbgene]

I have a 05 Yuk, was thinking of moving up in years but I continually read of all the problems the newer models are having. My old 05 134K only problem is the damn a/c but I can tinker with it for 80 grand

 

[CMoore711]

Where is your dealer located where i can get this done for free.

Here's their site: http://www.springfieldgm.com/

Located in Springfield, OH

 

[FMS1]

I had a 2016 Yukon Denali 4-WD I purchased at 3,900 miles. Kept it two years almost to date and had 61,500 miles. I had number of small problems from camera/sensor's to 4-WD shiift problems sticking in 4-WD. Mainly small stuff all fixed under warranty. At around 59,000 + I started getting the vibration/rumble strip problems associated with the transmission/torque converter. This was the last straw for me. I took to the dealer at 61,000 and they immediately knew what the problem was. Changed and flushed transmission fluid, changed internal filter and filled with Mobil synthetic transmission fluid. Fixed under warranty to my surprise. Adviser said if this fix doesn't work the next step is changing the Torque converter then possibly transmission. The flush did fix the rumble problem.

I paid way too much money for this type of vehicle to have this type problem so I went following day and purchased a 2019 Honda Ridgeline -RTL-E. I've had 3 of these previously and always liked them but didn't care for the model change a couple of years ago so purchased the Yukon. Anyway, I'm happy again and I got very good price on trade, $41,000 plus so for me this worked out. Just very disappointed with GMC that they haven't been able to have better quality control and reliability for this vehicle. Really loved the drive/ride and great looks.

 

[dcyy]

Sorry to hear. How many miles on it when you bought it? I too recently bought a 2016 Denali used and just started feeling the vibrating (like driving over rumble strips) at various speeds and riding very rough like the suspension is way too hard. Fun stuff.

I too have a 16 Denali and just had the Torque converter replaced and trans. flushed/refilled under warranty after the sm trbl you describe.The shudder happens at diff. speeds and betw 65-70 on open road. This started happening on all GM cars(15-16) with the 8speed trans.Here is the service bulletin 16-NA-175. Good luck

 

[Garandman]

good luck, I stay away from new year models now learned my lesson

Ditto, I shyed away from 2015’s even though they were in the depreciation/off-lease sweet spot, due to being the first year on the new platform.

 

[fozzi58]

I'd love to get that kind of life out of a battery!!

Buy an Optima battery next time. I installed an Optima yellow top in my Trans Am in July of 05 (<- not a typo). The only reason I am replacing it this winter is cause I am afraid it may just die on me. Had a red top in my 08 Avalanche. Put it in on year 3 of owning the vehicle and sold it with the same battery 6+ years later. Its still going cause I know the new owner. Same battery.

 

[xDan]

I understand what you're saying about the battery. I live in upstate NY, where we can have some extremely cold weather. In 30 years of driving, I've never, ever had a battery fail this quickly. I routinely get 5-7 years out of a battery, even in these harsh conditions we have 4-5 months a year. I traded in a loaded 2011 Chevy Avalanche LTZ with 124,000 miles on it for this Denali. The LTZ still had the original battery in it.

Your right, 5-7 years for a standard lead acid battery is quite normal.

When apple releases a software that has bugs gliches or doesn't work right do people pay to update their iPhone software?

Yes, every iPhone user pays. With every software update apple pushes, every iPhone user gets a slower OS and whoever has an older one gets such bad functionality they are forced to upgrade. Apple has a class action lawsuit against them for purposefully pushing updates intended to slow down users phones. Not the best analogy to pick!

I have a 05 Yuk, was thinking of moving up in years but I continually read of all the problems the newer models are having. My old 05 134K only problem is the damn a/c but I can tinker with it for 80 grand

Yea new owners get hosed, even on depreciation alone. I bought a 14 year old 03 for $3500, the previous owner replaced the brake booster and rear line, and after a year all I have had to replace is the front brake disks, front shocks and a windshield which was under collision coverage.

 

[petethepug]

Borrow or buy an Optima charger b4 u condemn the yellow top. Pull both terminals off the battery (important). Charge it for 10 min w/ normal charger if it’s totally dead, then put it on the Optima charger and it will recondition it back to 100% or diagnose it. Expect 8-22 hours to recondition it.

If the yellow tops not a daily, the Optima charger will keep it maintained and recondition it every 30 days. Ok to keep the battery connected to terminals after initial recondition.




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[dapapa]

Sorry to hear. How many miles on it when you bought it? I too recently bought a 2016 Denali used and just started feeling the vibrating (like driving over rumble strips) at various speeds and riding very rough like the suspension is way too hard. Fun stuff.

Same issue here with my '15 Yukon Denali. Dealer insists suspension and trans are all up to specs. In addition to the rumble strip vibration, the 8 speed trans clunks and bangs at low speed. At this point, in for a penny, in for pound

 

[dapapa]

I can't believe there are dealers charging to do this transmission service bulletin, for any part of it. The flush, TCM software reprogram, etc.

You should find it very odd that they're willing to cover the replacement Torque Converter under the warranty, but not the software. It's GM's factory TCM software that is being updated with GM's new TCM software in direct response to the transmission service bulletin. When apple releases a software that has bugs gliches or doesn't work right do people pay to update their iPhone software?

My dealer did the entire transmission service bulletin service on mine for free, and didn't charge me a dime.

Those who are getting quoted any $ to perform the transmission service bulletin need to find a new dealer.

 

[dapapa]

My dealer insists there is no factory service available to fix the rumble-strip vibration. How did you get your dealer to torque converter.