Does anyone have any experience with the leveling (not lift) kit offered by GM ? I'm considering having it done mainly because of the visual stance of the vehicle. But, during the summer I tow a travel trailer including using the weight distribution hitch. When towing, would this change have any effect in the handling of the Colorado ? I notice when currently using the weight distribution hitch, the combination of the truck and trailer appears to be almost perfectly level. The local GM dealer says I'll also have to get a wheel alignment and headlight adjustment. So, looking for information of other Colorado/Canyon owners that have used this kit ?