At this point it is not clear whether this is a recall or just a TSB, but here is what I know:GM Program #:N140572
Date Issued:
Sep 19, 2014
Program Title:
AUXILIARY TRANSMISSION COOLER LINE
If you have an convertible punch in your VIN here and see if your car is affected.
https://recalls.gm.com/#/
I got a VIN from a new 2014 convertible and found that the work had not been completed on that vehicle. I would expect you will receive a notice from GM if your car is affected, and I think it will be.