There is something to this....my 2011 6.2l sierra does this as well, I hold down the traction control button, and first the dic says traction off, then a couple seconds later it says stabilitrack off. Now, at this point, if stopped, you can burn out or powerslide
doughnuts till your hearts content. But if you go above a certain speed, it seems the stabilitrack reactivates without flashing anything on the dic. Dont know what speed, but I am sure it cuts in as the track light flashes when the back ends slides around pretty good and the slide is stopped the power is cut and certain wheels are braked.