Since we purchased our Traverse it idles funny when cold. In the morning it idles when you first start it at about 1500 rpm. Within the first minute or two my engine will drop in rpm by about 500 or so like its going to stall and then pick back up again. Its enough that I can hear it in the exhaust if I'm standing at the rear of it. Also, I let my car warm up for a little bit before I drive it. When I first drive it there seems to be a hesitation. You step on the throttle and it takes a second before it starts to accelerate. Once I drive it for a mile or so its fine. These happen only when its cold. Anyone else have these issues? Its going to be a few weeks before I can get it into the dealer.