A sporty new Z71 off-road option package for 4x4s included wheel flares, lower body moldings, color-keyed bumpers and grille, tubular side steps, and 17-inch wheels. GMs OnStar emergency/communication system was standard in the LT and Z71 Tahoe and Suburban, and optional in LS versions. With new aluminum cylinder heads, the 6.0-liter V8 gained 20 horsepower.