Hard Downshift from 3rd to 2nd on deceleration

[DucInAltum]

I recently noticed that as I decelerate and the transmission downshifts from 3rd to 2nd, the shifting is more noticeable. At times, it even feels as though I've hit a bump in the road. I first noticed this after towing our boat to and from the lake (about 2.5 hours each way). The boat is under the towing capacity.

I have looked up about doing a TCM reset, but all I see are posts on chevy's.

Mine is a '23 Yukon slt diesel with 20k miles on it.

Any advice?

 

[Big Mama]

Almost sounds like a loose motor mount or transmission mount. Good thing it’s still under warranty.

 

[Joseph Garcia]

Use your warranty to get this issue checked out. It may be an easy fix.