Torque Converter

[Obxhoops]

I was very close to trading my 2016 GMC Yukon Denali due to the extreme shaking and vibration coming from the tranny/rear area of the truck. As some have described, it was like going over rumble strips. Took it to my dealer and they diagnosed it as a torque converter issue. They drained the trans fluid as per the TSB and it now drives like a new truck. The best part is it was covered under warranty. The GM instructions are to drive it at least 200 miles but the difference was immediate.

 

[Miami-Dade]

Glad it worked out well for you and you are a happy camper again! I would hated to see you have to sell the Denali for a Ford or something else.

 

[FMS1]

I was very close to trading my 2016 GMC Yukon Denali due to the extreme shaking and vibration coming from the tranny/rear area of the truck. As some have described, it was like going over rumble strips. Took it to my dealer and they diagnosed it as a torque converter issue. They drained the trans fluid as per the TSB and it now drives like a new truck. The best part is it was covered under warranty. The GM instructions are to drive it at least 200 miles but the difference was immediate.

I have a 2016 Denali 4-WD with 61,000 miles and having exactly the same problem. I notice it more when switches to 4-cylinder under slight load. Does anyone have the TSB number for this fix? I appreciate the help.

 

[MechEng813]

Mine is in right now for exactly this @54k.
Been a week so far, because a trans temp sensor was on backorder.
Hope it resolves it, been considering a Model S 90d.

 

[G00se]

I have a 2016 Denali 4-WD with 61,000 miles and having exactly the same problem. I notice it more when switches to 4-cylinder under slight load. Does anyone have the TSB number for this fix? I appreciate the help.

I’d like to know as well. Same truck, year, miles, drive, and issue as mine.

 

[dbbd1]

I’d like to know as well. Same truck, year, miles, drive, and issue as mine.

I have a 2016 Denali 4-WD with 61,000 miles and having exactly the same problem. I notice it more when switches to 4-cylinder under slight load. Does anyone have the TSB number for this fix? I appreciate the help.

Have either of you tried the bolt mod? If it seems to happen going into or in V4 mode, you may just be feeling/hearing the flapper.

 

[G00se]

Have either of you tried the bolt mod? If it seems to happen going into or in V4 mode, you may just be feeling/hearing the flapper.

I plan to do the bolt mod anyway so I'll report back. Fingers crossed.

 

[G00se]

Found this as it seems related, going to give it a try.

 

[dbbd1]

Do you have the 8-speed trans?
That's what the TSB is for.

 

[coacht]

I had this service, flush and software reprogram done last week on our '16 8 speed. And haven't had an issue since.

Cost me $635 out of pocket. But the way it was driving I was afraid it was going to be something worse than this. So I was glad to only pay the $635.