AD9T; Crew Cab. AD9T; Extended Cab. Sierra; 4WD; w/o Damping Control; w/o Performance Pkg.; w/o Enhanced Towing; w/o Snow Plow; Z71 Pkg.; Code AD8J. Sierra; 4WD; w/o Damping Control; w/o Performance Pkg.; w/o Enhanced Towing; w/o Snow Plow; Z85 Pkg.; Code AC35. Sierra; RWD; w/o Damping Control; w/o Perf. Silverado. Towing Pkg.; Crew Cab; Z85 Pkg.; w/Snow Plow. Towing Pkg.; Double Cab; Z85 Pkg..