There are three new colors and revised outside mirrors, but most changes to the '99 Jimmy are inside. You'll find new power-seating features, redundant radio controls and a mini-module depowered airbag in the steering wheel, as well as a new Bose premium sound system and six-disc CD changer. A vehicle content theft alarm, flash-to-pass headlamp feature and liftgate ajar warning lamp have also been added. Four-wheel-drive versions get the new AutoTrac active transfer case and four-door models gain a tow/haul mode for the transmission. Finally, the optional Z85 Euro-Ride suspension has been retuned.