2016 Yukon Denali Transmission Shudder

mcheck14 · Jul 29, 2020

I'm sure this has been discussed on here before but recently in the past week I have been noticing a shudder in the transmission. A quick search online tells me this is a known issue with the 8 speed and has a class action lawsuit pending along with multiple TSB's released by GM. I have the shudder issue and hard shift into gear every now and then. Has anyone had any luck on fixing this problem?

2016 Yukon Denali w/ 61,000 miles

I'm looking for some input before I take it into the dealership.

Any recommendations would be greatly appreciated.

GreyStone · Jul 29, 2020

Tahoe14 · Jul 29, 2020

GM has a newer fluid that was designed to address the 8speed transmission issues. Your Dealer should be aware of it.

Denali Brad · Jul 29, 2020

I had the same problem with my 2016 8 speed. Going down the highway it would feel like you kept hitting the rumble sticks.

There is a TSB and the fluid flush and change fixed it....the occasional hard shift remains though.

Good luck.

CMoore711 · Jul 29, 2020

They performed the TSB trans fluid change and also reprogramed the TCM on my 2015 Denali with the 8 speed, this would have been around 48K-ish miles. Surprisingly it took care of the issue and currently at 97K and they haven't came back.

mcheck14 · Jul 29, 2020

Awesome! Thanks for the feedback fellas!

sealandsky · Jul 30, 2020

mcheck14 said:
Awesome! Thanks for the feedback fellas!

If the shudder is happening on the highway it could also be the lock-up torque converter clutch failing. My 2016 Denali was doing that when I traded it in at 38,000 miles.

dcyy · Aug 3, 2020

mcheck14 said:
I'm sure this has been discussed on here before but recently in the past week I have been noticing a shudder in the transmission. A quick search online tells me this is a known issue with the 8 speed and has a class action lawsuit pending along with multiple TSB's released by GM. I have the shudder issue and hard shift into gear every now and then. Has anyone had any luck on fixing this problem?

2016 Yukon Denali w/ 61,000 miles

I'm looking for some input before I take it into the dealership.

Any recommendations would be greatly appreciated.

Same thing happened to my 16 -TSB 16-NA-175 is the bulletin that addresses the problem.The dealer not only replaced the tranny fluid,they also replaced the torque converter-problem solved.

mcheck14 · Aug 13, 2020

UPDATE: Just got it back today. They did the transmission flush. Everything seems to be OK so far. They ended up covering the cost of it since I was only a 1,000 miles out of warranty.

jerryhipp · Aug 15, 2020

im having this issue. only problem is mine is a 2015 6spd.

2016 Yukon Denali Transmission Shudder

mcheck14

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GreyStone

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Tahoe14

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Denali Brad

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CMoore711

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mcheck14

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sealandsky

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dcyy

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mcheck14

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jerryhipp

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