Never will GM allow the turn off of the tire pressure warnings. I have called a few about turning it off at least when 4-lock low is engaged (someone elses idea here on the site), and I was told NEVER. Legal won't allow it and that is that. But, most I talked to said it was a good idea, and maybe in the future...
As for the stab being off and the system chiming when you are in the air, possibly it is due to the spinning tire(s), it is chiming to remind you it is off, when it should be on. Just a thought....
