I recently purchased an 07 CTS and was wondering what is the highest gear that you can start up with when using the manual Driver Shift Control? I can't notice a difference no matter which gear I shift it into before starting up. The manual says that for starting up on ice, you can select a higher gear using the DSC for more traction. Also does the car always automatically shift to low in DSC mode when coming to a stop or does it maintain the gear you were currently in?