Engine`Vortec 6.2L Variable Valve Timing V8 SFI E85- compatible`FlexFuel capable of running on unleaded or up to 85% ethanol (403 hp [300.5 kW] @ 5700 rpm`417 lb-ft of torque [565.4 N-m] @ 4300 rpm)`Rear axle`3.42 ratio (Refer to Engine-Axle chart for availability.)`Suspension Package`High-Performance includes 36mm front stabilizer bar`GVWR`7000 lbs. (3175 kg) (Requires TK10543 models.)`Differential`heavy-duty automatic locking rear`Heavy Duty Cooling Package`heavy-duty includes (KC4) external engine oil cooler`(KNP) auxiliary external transmission oil cooler`electric fan and heavy-duty radiator`Cooling`external engine oil cooler heavy-duty air-to-oil`integral to driver side of radiator tank`Cooling`auxiliary external transmission oil cooler heavy-duty air-to-oil`Battery`heavy-duty 600 cold-cranking amps maintenance-free with rundown protection and retained accessory power`Alternator`145 amps`Frame`fully-boxed`hydroformed front section`Trailering Package`heavy-duty includes trailering hitch platform`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 and instrument panel jumper wiring harness for electric trailer brake controller`Skid Plate Package includes front underbody shield starting behind front bumper and running to first cross-member`protecting front underbody`oil pan`differential case and transfer case`frame-mounted shields`Recovery hooks`front`Black`Pickup box`Wideside`Suspension`front coil-over-shock with stabilizer bar`Suspension`rear 2-stage multi-leaf springs`semi-elliptic`Steering`power`Brakes`4-wheel antilock`4-wheel disc`Exhaust`aluminized stainless-steel muffler and tailpipe`Tools`mechanical jack and wheel wrench located in back of cab`Wheel`17" x 7.5" (43.2 cm x 19.1 cm) steel spare`LPO`Rear wheelhouse liner`Tire carrier lockable outside spare`winch-type mounted under frame at rear`Spare tire lock keyed cylinder lock that utilizes same key as ignition and door`Bumper`front body-color`Bumper`rear body-color`step-style with pad`Air dam`color-keyed`Moldings`body-color bodyside with chrome insert`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`Mirrors`outside heated power-adjustable`power-folding and driver-side auto-dimming`body color`with integrated turn signal indicators and curb-tilt`Glass`Solar-Ray deep-tinted (all windows except light-tinted glass on windshield`driver- and front passenger-side glass)`Wipers`front intermittent wet-arm with pulse washers`Tailgate protection`top of tailgate protection cap`Tailgate`locking`Tailgate`EZ-Lift`Door handles`chrome`Audio system feature`Bose premium speaker system with sub-woofer in center console`Bluetooth for phone personal cell phone connectivity to vehicle audio system (Requires OnStar hardware (UE1)`but subscription to OnStar services not required for operation.)`Seat`rear 60-40 folding bench (folds up)`3-passenger`folding (includes child seat top tether anchor)`Steering wheel`heated`leather-wrapped and color-keyed with theft-deterrent locking feature`Steering wheel controls mounted audio and Driver Information Center controls which provides access to enhanced Driver Information Center features and information`Steering column Tilt-Wheel`adjustable with brake-transmission shift interlock`color-keyed`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)`Instrumentation`analog with speedometer`odometer with trip odometer`fuel level`voltmeter`engine temperature`oil pressure and tachometer`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`Pedals`power-adjustable for accelerator and brake`Universal Home Remote`Cruise control`electronic with set and resume speed`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`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`Rear Parking Assist`Ultrasonic with audible warning`StabiliTrak`stability control system with Proactive Roll Avoidance and traction control`includes electronic trailer sway control and hill start assist`Daytime Running Lamps with automatic exterior lamp control`Air bags`frontal`driver and right-front passenger with Passenger Sensing System (Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)`Air bags`head curtain side-impact`front and rear outboard seating positions with rollover sensor (Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)`Air bags`seat-mounted side-impact`driver and right-front passenger for thorax and pelvic protection (Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)`Rear Vision Camera (Note: images appear on Navigation screen for units equipped with (UYS) AM-FM stereo with MP3 compatible CD-DVD player and navigation). (Requires (UUL) AM-FM stereo with MP3 compatible CD player and navigation or (UUK) AM-FM stereo with MP3 compatible CD-DVD player and navigation.)`Door locks`rear child security.