My 2018 owners manual shows TES-295 as a recommended fluid as well; my assumption is that wouldn't trigger a warranty concern but who knows now-a-days.I did it at 14k miles, and never looked back. The improvement in shift quality is reason enough , at least to me.
If there ever is some kind of warranty issue with the transmission ( ....very, very unlikely) there is no way they will know there is a TES-295 fluid in there.
If the fluid is thin, red, and oily..... thats as far as the fluid investigation will go.
how exactly is this a loss of advantage??This is all news to me. There goes one of the main advantages GM had. Maybe some day they will all use the same drive train and then all that will be left between them is the styling. If the latest Silverado is any indication perhaps GM should then leave the truck market and concentrate on cars like Ford has left the car market to concentrate on trucks.
We're pretty much there advertising-wise. Noone touts their engine or mechanical specs with the exception of pickups and payload capacity. Its all focused on niceties and convenience options. Heck, look at ford. Their advertising for some of the f150s is to convince people that probably SHOULD NOT be pulling ANY load at all... that their pickup can help them back it up.'dunno;When the same thing happens between different makers then we will have lost much of the reason for brand loyalty.