Hello. I am new here, and I just bought a 2013 Suburban LT with power, heated mirrors....the ones that fold in at the touch of a button, and have the signal arrows in the glass. The passenger mirror has a wide range of adjustment, but the driver's side will not adjust upward enough to suit me. I find that at the top of it's travel, I am looking downward at the pavement, only a car length or two back. I cannot see "down the road" behind me in the lane to my left. I complained to the dealership, and they tell me that all of the Suburbans have the same range of motion, and there's nothing wrong with my mirror. Can anyone suggest a solution, or is the dealership telling me correctly?