Dealer computer CAN adjust the TPMS pressures to whatever you want.That's a neat trick. I'll have to give that a shot. For me though, I don't think I can manage running the pressures that low. I'm thinking the TPMS would be triggered on the rear.
Some have found there dealer was reluctant.
Mine just said 'what pressures would you like it set to?'
We pulled truck in and the connected to it wirelessly and made the change.
The 'Onstar app' showed the pressures we set it to as the 'recommended