This GMC Sierra 3500HD boasts a Gas V8 6.6L/ engine powering this Automatic transmission. WHEELS, 18 (45.7 CM) 8-SPOKE PAINTED STEEL, SILVER EXTENDED (STD), UPFITTER SWITCH KIT, (5) Provides 3-30 amp and 2-20 amp configurable circuits to facilitate installation of aftermarket electrical accessories. Kit with all required parts will be shipped loose with the truck for installation by the dealer or upfitter at customer expense. Installation instructions and technical assistance available at www.gmupfitter.com., TRANSMISSION, 10-SPEED AUTOMATIC (STD).*This GMC Sierra 3500HD Comes Equipped with These Options *SNOW PLOW PREP/CAMPER PACKAGE includes (KW5) 220-amp alternator, includes increased front GAWR on Heavy Duty models, (NZZ) skid plates (transfer case and oil pan), pass through dash grommet hole and roof emergency light provisions. Contact GM Upfitter Integration at www.gmupfitter.com for plow installation details and assistance. Note: if ordered for Camper usage, recommend ordering (UY2) Trailering wiring provisions and includes (KW5) 220-amp alternator, CONVENIENCE PACKAGE includes (QT5) EZ Lift power lock and release tailgate, (AKO) tinted glass, (UF2) LED cargo bed lighting and (C49) rear-window defogger. Note: when (G9Y) 14,000 lbs. (6350 kg) with dual rear wheels is ordered, (DWI) Mirrors, outside power-adjustable vertical trailering will be required., 1SA PRO SAFETY PLUS PACKAGE includes (UD5) Front and Rear Park Assist, (UFG) Rear Cross Traffic Alert, (UKC) Lane Change Alert with Side Blind Zone Alert and (DWI) trailer mirrors , TRAILERING WIRING PROVISIONS for trailering, 5th wheel and gooseneck trailer, includes additional 7-way wiring harness located at the rear of the pickup bed attached to the rear frame cross member, TIRES, LT275/70R18E ALL-TERRAIN, BLACKWALL (STD), TIRE, SPARE LT275/70R18 ALL-TERRAIN, BLACKWALL (STD), TAILGATE, GATE FUNCTION MANUAL WITH EZ LIFT includes power lock and release, includes hitch area light, SKID PLATES protect the oil pan, front axle and transfer case, SINGLE REAR WHEELS (STD), SEATS, FRONT 40/20/40 SPLIT-BENCH with covered armrest storage and under-seat storage (lockable) (STD).