Maybe someone can refresh my memory. When you cold start your Traverse it goes to high idle for abou 45 seconds or so. I always let my Traverse RPMs drop to 900 or so before I put my foot on the brake and shift into gear. Now, sometimes, my wife will not wait for the high idle to end, and she will just go ahead and press the brake pedal and shift into reverse. What is that TONE that you hear when you are still in high idle and you press the brake?