POWER RETRACTABLE ASSIST STEP WITH LED LIGHTING POWER SUNROOF TECHNOLOGY PACKAGE 50-STATE EMISSIONS REAR AXLE: 3.42 RATIO GVWR: 11,350 LBS. (5,148 KG) ENG: DURAMAX 6.6L TURBO-DIESE TRANS: ALLISON 10-SPEED AUTO TRAILERTIRE PRESSURE MONITOR SYSTEM 18'A...