Was driving my tahoe today it almost COST me HUGE accident

Almost broke my wrist, the POWER steering BY IT SELF rotated all the way to going right (suspect a computer input error? )
I don't remember getting the self driving option or Auto pilot...

I swear that I had ZERO intentions on going that direction Nor was it the direction i was going. it would cost me an extra 0.40 cents in gas going that way..

I even had my left turn signal on (I would not want to jeopardize my driving record or even higher insurance rates doing stupid stuff like that)
btw it did say service power steering. for a moment then went away

if you want you can watch it here youtube.com/ watch?v=7lUqZUsOLEk [delete the space in the url]