Transmission Reset

[Adam10532]

I have a 2016 Yukon XL.
First time this happening in 2 years.
I left the house and the truck felt like I was down shiftin when I came to a stop. Like double breaking. Taking off was weird like a big clunk/jolt.
After an hour of driving like this. I parked for like 20 minutes and everything went back to normal.
Any ideas?
Thanks

What became of this issue ? My 2016 yukon xl Denali just started this very thing.

 

[AngelXL]

Nothing. Just that one time