Duramax 6.6L Turbo-Diesel V8,470 hp,975 lb-ft torque,4WD,Crew Cab Custom,Allison 10-speed automatic,trailer brake controller,auto-locking rear differential,Hitch Guidance,Lane Departure Warning,Following Distance Indicator,Push Button Start,20” all-terrain tires,CornerStep bumper,BedStep,12 cargo tie-downs,Durabed HD strength