if you look closely at the center stack in this picture (http://www.gminsidenews.com/naias/GMT900/Yukon/yukh9.jpg), you can see a series of butons under the HVAC controls. It looks like (from left to right) 'pedal adjustment, ultrasonic parking, and i assume that one of the remaining 4 are for stabilitrack.
Any idea what the other ones are? It almost looks like the 5th one from the left is a ride hight adjustment...?