Only cars with the Magnetic Ride Control option can vary the suspension stiffness with the mode switch.I tried it in track mode today and it definitely tightened up a bit more. Still would like it to be stiffer and less bouncy, but I can't complain as it's good enough. Any idea if track mode turns off traction or stability control, don't see anything on the dashboard or settings about traction control.
The mode switch can vary the steering, exhaust and braking feel in different modes on all models.
The traction control switch is at the front of the console in front of the mode switch.
On Z51 cars you have PTM ( performance traction management) in Track mode which gives you
different levels on traction control for different track conditions. PTM is included with the Z51
electronic differential.