Nothing in the mail. Checked for recall with my Chevrolet app and popped up. GM program #2044120 date issued Jun 21,2016.
Program title: Cracked 2-3-4-6-8 Clutch Piston
Program description: Certain 2016 model year Cadillac CT6, Chevrolet Silverado LD and GMC Sierra LD vehicles, equipped with an 8-speed automatic transmission, may have a condition in which the 2-3-4-6-8 Clutch Piston is out of specification. Parts exhibited a crack condition as cast after machining. As a result the vehicle could exhibit 1-2 up shift slipping ot a flaring condition.
Safety Risk Description: The Vehicle could exhibit 1-2 up shift slipping or a flaring condition.
Repair Description: Replace the transmission.
This is all I have information wise. Dealer confirmed I would get a entirely brand new transmission. I'll keep you all posted.