The Yukon XL gains numerous functional enhancements for 2003. The Quadrasteer four-wheel steering system is now available on 3/4-ton models for increased maneuverability and better stability when towing, while 1/2-ton versions now offer the Stabilitrak stability control system. Also this year, buyers get a choice of two new optional exterior mirrors: a multifunction power fold-away version with puddle lamps and integrated turn signal lights or extended camper mirrors that are also power foldable. The interior gets numerous upgrades that include tri-zone climate control, an enhanced driver-information center and a redesigned center console and instrument panel. Steering wheel-mounted audio controls are now optional, as are second-row captain's chairs and power adjustable pedals. A revised lineup of entertainment options offers buyers a Bose audio system as well as XM Satellite Radio and a DVD-based entertainment system. Finally, for increased safety, the Yukon XL now features a standard front-passenger-sensing system, dual-stage airbags and three point seatbelts for all positions in the first and second rows.