Originally Posted by DieselDisco
I wonder if the vehicle will stay in neutral if I remove the battery. The issue isnt the transmission or lubrication obviously.
I don't know that I would go with "obviously". The article I saw said that the Terrain system took "full" advantage of the electronic controls in the transmission. That implied something to me but I have no way to know what it really means.
I do know the 2018 - 2020 Equinox model years had a redesigned electrical system so that no fuses need pulled but a battery charge line is needed. My Equinox pulls 7.8 amps out of the battery when in tow mode so it's doing something. That apparently is at least double the current of other cars.
I do know that the 2010- 2017 Equinox originally said to pull fuse 32 but that caused some cars to have the "death wobble" due to some issue with the return-to-center feature of the steering. GM changed the procedure for those model years to leave that fuse in place and pull a different one, the one that disables the anti-lock brakes.
GM seems to like building their cars as flat tow-ready. If the Terrain could do it safely I think they would have found a way.
You may be able to get your dealer to put an inquiry into the GM Learning Center. Chevrolet has one so I presume that GM does as well.