The 2007 GMC Yukon's outward visibility couldn't get any better. With a large, unobstructed field of view in the rearview mirror and large side mirrors that eliminate blind spots, the only thing better is the optional rearview camera system that activates when reversing. Unfortunately, to get the camera you must purchase the pricey navigation system. Those that like to look over their shoulder before changing lanes will find the second-row headrests block visibility out the rear passenger's side quarter window, but the side mirror compensates for that and you shouldn't be looking away from the road anyway. Forward visibility is also excellent, making it easy to locate the front corners.