Z71 is the RPO code for a special off-road package offered by General Motors. This option first appeared on the 1988 to 1998 generation GMT400 trucks. In 2000, Z71 became an option package on Chevrolet Tahoes. Features include four wheel drive and optional 2 Wheel Drive, on/off-road tires, an automatically locking rear differential, color-coded bumpers, fog lamps, a skid plate, special 5 spoke aluminum alloy wheels, and distinctive "Z71" badges. "Z71" Tahoes could be ordered in 5 colors: Sport Red, Bermuda Blue, Silver Birch, Black, or Summit White. With the success of "Z71" as a separate model rather than just a suspension package, Chevrolet Tahoes and soon after Suburbans continued this option and it is still available on current Tahoes, Avalanches, Silverados, Suburbans, and Colorados.