Suspension Package, Handling-Trailering, heavy-duty includes 35mm monotube shocks and 34mm front stabilizer bar`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 (JL1) integrated trailer brake controller`Transmission, 6-speed automatic, heavy-duty electronically controlled with overdrive and tow-haul mode (Requires (L96) Vortec 6.0L V8 SFI engine.)`Pickup box, Wideside`Air cleaner, high-capacity`Transfer case, electronic shift with rotary dial controls (Requires 4WD models)`Differential, heavy-duty automatic locking rear`Four wheel drive`Cooling, auxiliary external transmission oil cooler heavy-duty air-to-oil`Cooling, external engine oil cooler heavy-duty air-to-oil, integral to driver side of radiator tank`Battery, heavy-duty 600 cold-cranking amps, maintenance-free with rundown protection and retained accessory power`Alternator, 125 amps`Trailer brake controller, integrated`Frame, fully-boxed, hydroformed front section`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`Suspension, front independent, torsion bar`Suspension, rear 4+1+2 multi-leaf springs for single rear wheel and 3+1+2 multi-leaf springs for dual rear wheel`Steering, power`Exhaust aluminized stainless-steel muffler and tailpipe`Tire carrier, outside spare, winch-type mounted under frame at rear`Spare tire lock keyed cylinder lock that utilizes same key as ignition and door`Air dam, color-keyed`Bumper, front body-color`Bumper, rear body-color, step-style with pad`Moldings, bodyside, body-colored`Grille, chrome surround with chrome center, Denali-exclusive`Headlamps, dual halogen composite with automatic exterior lamp control and flash-to-pass feature`Fog lamps, front, halogen`Lamps, dual cargo area lamps`Lamps, Smoked Amber roof marker`Mirrors, outside heated power-adjustable vertical camper manual-folding and extension, Black includes integrated turn signal indicators consisting of 50 square inch flat mirror surface positioned over a 20 square inch convex mirror surface with a common head and lower convex spotter glass (convex glass is not heated or power adjustable)`Glass, Solar-Ray deep-tinted (all windows except light-tinted glass on windshield and driver-and front passenger-side glass)`Wipers, front intermittent wet-arm with pulse washers`Door handles, chrome`Tailgate protection top of tailgate protection cap`Tailgate, locking`Tailgate, EZ-Lift`Audio system, AM-FM stereo with MP3 compatible 6-disc CD player seek-and-scan, digital clock, auto-tone control, Radio Data System (RDS), automatic volume, TheftLock, auxiliary input jack, USB port and 36 cross-band presets`XM Radio is standard on nearly all 2011 GM models and includes 3 months of trial service. Get over 170 channels, including: commercial-free music, sports, news, talk, entertainment, comedy, family and kids' channels, and much more. With XM's incredible range of programming, everything worth listening to is on XM (Not available with (UUL) AM-FM stereo with MP3 compatible CD player and navigation, (UUK) AM-FM stereo with MP3 compatible CD-DVD player and navigation or (UE0) OnStar, delete. Requires a subscription sold separately by XM after the first 90 days. Available only in the 48 contiguous United States and District of Columbia. Visit gm.xmradio.com for details.)`Audio system feature, Bose premium speaker system with sub-woofer in center console`Bluetooth for phone, personal cell phone connectivity to vehicle audio system`Seats, front bucket includes 10-way power driver and front passenger seat adjusters including 2-way power lumbar control, heated seat cushions and seatbacks, 2-position driver memory, adjustable outboard head restraints, floor console and storage pockets`Recovery hooks, front, frame-mounted`Seat trim, Perforated nuance leather-appointed seats`Seat adjuster, driver 12-way power`Seat adjuster, front passenger 12-way power`Seat, rear 60-40 folding bench (folds up), 3-passenger, folding (includes child seat top tether anchor)`Console, floor with CD carrier, storage bin, rear cup holders and rear powerpoints`Floor covering, color-keyed carpeting includes rear floor mats`Floor mats, color-keyed carpeted first and second row, removable`Steering wheel, leather-wrapped and color-keyed with theft-deterrent locking feature`Steering column, Tilt-Wheel, adjustable with brake-transmission shift interlock color-keyed`Steering wheel controls, mounted audio and Driver Information Center controls which provides access to enhanced Driver Information Center features and information`Instrumentation, analog with speedometer, odometer with trip odometer, fuel level, voltmeter, engine temperature, oil pressure and tachometer`Driver Information Center with odometer, trip odometer and message center (monitors numerous systems depending on vehicle equipment level including low fuel, turn signal "on", transmission temperature and oil change notification)`Warning tones headlamp on, key-in-ignition, driver and passenger buckle up reminder and turn signal on`Windows, power with driver and front passenger Express-Down`Door locks, power`Pedals, power-adjustable for accelerator and brake`Cruise control, electronic with set and resume speed`Remote vehicle starter system includes Remote Keyless Entry with 2 transmitters, panic button and content theft alarm (Remote Keyless Entry does not lock-unlock tailgate.)`Universal Home Remote`Air conditioning, dual-zone automatic climate control with individual climate settings for driver and right-front passenger`Defogger, rear-window electric (Not available with (A48) power sliding rear window.)`Cup holders, in console and rear`Power outlets 2 auxiliary instrument panel-mounted with covers, 12-volt`Mirror, inside rearview auto-dimming`Headliner, Opal Gray-colored cloth with matching retainer moldings`Visors, driver and front passenger illuminated vanity mirrors padded with cloth trim, Opal-Gray-colored`Assist handles, front passenger and rear outboard`Lighting, interior with dome and reading lights, illuminated entry feature and blue backlit instrument panel switches`Coat hooks, driver- and passenger-side rear`Daytime Running Lamps with automatic exterior lamp control`Air bags, frontal, driver and right-front passenger (Always use safety belts and the correct child restraints for your child's age and size, even in vehicles equipped with air bags. Children are safer when properly secured in a rear seat. See the vehicle's Owners Manual and child safety seat instructions for more safety information)`Automatic Crash Response`OnStar, 6 months of Directions and Connections plan includes Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance including Remote Ignition Block, Remote Door Unlock (requires power locks), Turn-by-Turn Navigation with Destination Download (requires navigation radio) and OnStar eNav (where available), OnStar Vehicle Diagnostics, Roadside Assistance, Remote Horn and Lights, and Hands Free Calling. (Also includes Stolen Vehicle Slowdown when (LML) Duramax 6.6L Turbo Diesel V8 engine is not ordered. Not available with a ship-to of Puerto Rico or the Virgin Islands. Visit onstar.com for details and system limitations.)`Stolen Vehicle Assistance`OnStar Turn-by-Turn Navigation`Rear Parking Assist, Ultrasonic with audible warning`Door locks, rear child security`Driver Air Bag`Passenger Air Bag`Front Side Air Bag`Front Head Air Bag`Rear Head Air Bag`Climate Control`Multi-Zone A-C`A-C`Security System`AM-FM Stereo`CD Changer`CD Player`ABS`4-Wheel Disc Brakes`Cruise Control`Rear Defrost`Locking-Limited Slip Differential`Child Safety Locks`Four Wheel Drive`8 Cylinder Engine`Turbocharged`Floor Mats`Diesel Fuel`Daytime Running Lights`Keyless Entry`Power Door Locks`Heated Mirrors`Power Mirror(s)`Power Driver Seat`Power Passenger Seat`Pass-Through Rear Seat`Leather Seats`Bucket Seats`Power Steering`Adjustable Steering Wheel`Tires - Front All-Season`Tires - Rear All-Season`6-Speed A-T`Power Windows`Intermittent Wipers`A-T`Premium Sound System`Satellite Radio`MP3 Player`Fog Lamps`Heated Front Seat(s)`Privacy Glass`Steering Wheel Audio Controls`Power Outlet`Automatic Headlights`Auto-Dimming Rearview Mirror`Integrated Turn Signal Mirrors`Driver Vanity Mirror`Passenger Vanity Mirror`Driver Illuminated Vanity Mirror`Passenger Illuminated Visor Mirror`Rear Parking Aid`Adjustable Pedals`Front Reading Lamps`Driver Adjustable Lumbar`Passenger Adjustable Lumbar`Seat Memory`Leather Steering Wheel`Transmission Overdrive Switch`Tow Hitch`Tow Hooks`Universal Garage Door Opener`Bluetooth Connection`Telematics`Remote Engine Start`Auxiliary Audio Input`Navigation from Telematics`Rear Bench Seat