KBB.com Brand Image Awards. This GMC Sierra 3500HD boasts a Turbocharged Diesel V8 6.6L/403 engine powering this Automatic transmission. REAR AXLE, 3.73 RATIO, TRANSMISSION, ALLISON 1000 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, electronic engine grade braking and tow/haul mode, TRAILERING WIRING PROVISIONS, FOR CAMPER, FIFTH WHEEL AND GOOSENECK TRAILER includes additional 7-way wiring harness is located at the rear of the pickup box attached to the rear frame cross member.* This GMC Sierra 3500HD Features the Following Options *SUSPENSION PACKAGE, OFF-ROAD includes twin tube Rancho brand shocks and (JHD) Hill Descent Control, DURAMAX PLUS PACKAGE includes (LML) Duramax 6.6L Turbo Diesel V8 engine, (MW7) Allison 1000 6-speed automatic transmission and (Y65) Driver Alert Package, DRIVER ALERT PACKAGE includes (UFL) Lane Departure Warning, (UEU) Forward Collision Alert, and Safety Alert Seat, TIRES, LT265/70R18E ALL-TERRAIN, BLACKWALL, SWITCH, HIGH IDLE, SUNROOF, POWER, SUMMIT WHITE, SEATS, FRONT FULL-FEATURE LEATHER-APPOINTED BUCKET WITH (KA1) HEATED SEAT CUSHIONS AND SEAT BACKS. Includes 12-way power driver and front passenger seat adjusters, including 4-way power lumbar control, 2-position driver memory, adjustable head restraints, (D07) floor console and storage pockets and (K4C) wireless charging (STD), LPO, ASSIST STEPS, CHROMED TUBULAR, 6 RECTANGULAR (dealer-installed), LICENSE PLATE KIT, FRONT Note: (VK3) deletes center lower bumper filler panel..* Expert Reviews!*As reported by Edmunds: Impressive hauling and towing capabilities; refined and quiet ride; strong diesel engine; solid build quality.* Visit Us Today *Stop by Town & Country Ford located at 5401 East Independence Blvd, Charlotte, NC 28212 for a quick visit and a great vehicle!