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