I have a 2011 Traverse LTZ currently on order. I did not order NAV, but I do plan on frequently using an aftermarket Garmin GPS unit. Instead of dragging out the cord and windshield suction mount everytime I want to use it I was thinkin about hardwiring in the power cord. Has anyone else done this? Also, where have you guys found the best spot to use / mount /stick your portable GPS's. Thanks.....Mark.