This GMC Sierra 2500HD boasts a Turbo-Charged Diesel V8 6.6L/403 engine powering this Automatic transmission. 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 8-way wiring harness routed to front of pickup box, TRAILERING EQUIPMENT, HEAVY-DUTY includes trailering hitch platform and 2.5-inch receiver with 2" adapter, 7-wire harness (harness includes wires for: park lamps, backup lamps, right turn, left turn, electric brake lead, battery and ground) with independent fused trailering circuits mated to a 7-way sealed connector, wiring harness for after-market trailer brake controller (located in the instrument panel harness), and single wire for center high-mounted stop lamp. *This GMC Sierra 2500HD Comes Equipped with These Options * SUSPENSION PACKAGE, HANDLING/TRAILERING, HEAVY-DUTY includes 46 mm piston monotube shocks and 34mm front stabilizer bar (STD), SKID PLATE PACKAGE, FRAME-MOUNTED SHIELDS includes front underbody shield starting behind front bumper and running to first cross-member, protecting front underbody, oil pan, differential case and transfer case, EZ-LIFT TAILGATE PACKAGE includes (A60) locking tailgate and (PPA) EZ-Lift tailgate, CONVENIENCE PACKAGE includes (JF4) adjustable power pedals, (AP3) remote vehicle starter system and (UD7) Rear Parking Assist , SLT PREFERRED EQUIPMENT GROUP Includes Standard Equipment, SEATS, FRONT BUCKET includes 12-way power driver and front passenger seat adjusters, 4-way power lumbar control, power bolsters, heated seat cushions and seatbacks, 2-position driver memory, adjustable outboard head restraints, floor console and storage pockets (STD), SEAT TRIM, ULTRASOFT LEATHER-APPOINTED (STD), REMOTE VEHICLE STARTER SYSTEM includes Remote Keyless Entry, REAR PARKING ASSIST, ULTRASONIC with rearview LED display and aud

　　12-Way Power Driver Seat Adjuster

　　12-Way Power Front Passenger Seat Adjuster

　　17" x 7.5" 8-Lug Bright Machined Aluminum Wheels

　　3.73 Rear Axle Ratio

　　4-Wheel Disc Brakes

　　7 Speakers

　　ABS brakes

　　AM/FM Stereo w/MP3 Compatible 6-Disc CD

　　AM/FM radio

　　Air Conditioning

　　Auto-Dimming Inside Rear-View Mirror

　　Auto-dimming Rear-View mirror

　　Auto-dimming door mirrors

　　Automatic temperature control

　　Body-Colored Bodyside Moldings

　　Body-Colored Power-Adjust Heated Outside Mirrors

　　Bodyside moldings

　　Bose Premium Audio Speaker System Feature

　　Bumpers: chrome

　　CD player

　　Color-Keyed Carpeting Floor Covering

　　Compass

　　Delay-off headlights

　　Driver & Front Passenger Vanity Mirror Visors

　　Driver door bin

　　Driver vanity mirror

　　Dual front impact airbags

　　Dual-Zone Automatic Climate Control

　　Electric Rear-Window Defogger

　　Electronic Cruise Control w/Set & Resume Speed

　　Electronic Shift Transfer Case

　　Emergency communication system: OnStar

　　Floor Console w/Dual Cup Holders

　　Front Bucket Seats

　　Front Center Armrest w/Storage

　　Front Halogen Fog Lamps

　　Front Power Full-Feature Reclining Bucket Seats

　　Front anti-roll bar

　　Front dual zone A/C

　　Front fog lights

　　Front reading lights

　　Front wheel independent suspension

　　Fully automatic headlights

　　Garage door transmitter

　　Heated Windshield Washer Fluid System

　　Heated door mirrors

　　Heated front seats

　　Heavy-Duty Handling/Trailering Suspension Package

　　Illuminated entry

　　Leather-Wrapped Steering Wheel

　　Low tire pressure warning

　　Memory seat

　　Outside temperature display

　　Overhead console

　　Panic alarm

　　Passenger cancellable airbag

　　Passenger door bin

　　Passenger vanity mirror

　　Power Door Locks

　　Power Windows w/Driver/Front Passenger Express-Down

　　Power door mirrors

　　Power driver seat

　　Power passenger seat

　　Power steering

　　Power windows

　　Radio data system

　　Rear Audio System Controls

　　Rear audio controls

　　Rear reading lights

　　Rear seat center armrest

　　Rear step bumper

　　Rear window defroster

　　Remote keyless entry

　　Security system

　　Solar-Ray Deep-Tinted Glass

　　Spare Tire Lock

　　Speed control

　　Split folding rear seat

　　Steering Wheel Mounted Audio Controls

　　Steering wheel mounted audio controls

　　Tachometer

　　Tilt steering wheel

　　Trip computer

　　Turn signal indicator mirrors

　　Ultrasoft Leather-Appointed Seat Trim

　　Universal Home Remote

　　Variably intermittent wipers

　　Voltmeter