This GMC Sierra 2500HD delivers a Turbocharged Diesel V8 6.6L/ engine powering this Automatic transmission. WINTER GRILLE COVER, WHEELS, 20 (50.8 CM) ULTRA-BRIGHT MACHINED WHEELS, TRANSMISSION, ALLISON 10-SPEED AUTOMATIC.* This GMC Sierra 2500HD Features the Following Options *TECHNOLOGY PACKAGE, DENALI RESERVE PACKAGE , TRAILER TIRE PRESSURE MONITOR SENSORS, TIRES, LT275/65R20 ALL-TERRAIN, BLACKWALL, SUNROOF, POWER, SEATS, FRONT BUCKET, REAR CAMERA MIRROR, REAR AXLE, 3.42 RATIO, ONYX BLACK, MULTICOLOR 15 DIAGONAL HEAD-UP DISPLAY.