The Tahoe’s navigation system works well, but the buttons surrounding the screen are small and hard to see at a glance. Same goes for the rubber-gripped knobs; we prefer them to buttons, but c’mon, your fingers have to be eensy to be comfortable gripping these. Another quirk: You must have the radio on for the navigation screen to be on. Why they can’t be on independently is anybody’s guess. Programming the navigation system is an intuitively quick touch-screen affair, and directions are accurate and precise. The sound system’s quality is good, and the redundant controls on the steering wheel were handy, although it was too easy to accidentally change stations when turning the wheel.