2021 GMC Sierra 3500HD CREW CAB 4X4 DUALLY 8.8FT LB

StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist

Airbags, Dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat 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.)

Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching (Deleted with (ZW9) pickup bed delete.)

Rear Seat Reminder (Requires Crew Cab or Double Cab model.)

Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver

Tire Pressure Monitoring System with Tire Fill Alert (does not apply to spare tire)

MECHANICAL (19)

• Engine, 6.6L V8 with Direct Injection and Variable Valve Timing, gasoline (401 hp [299 kW] @ 5200 rpm, 464 lb-ft of torque [629 N-m] @ 4000 rpm)
• Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
• GVWR, 11,500 lbs. (5216 kg) with single rear wheels (Included and only available with model TK30943 model and (L8T) 6.6L V8 gas engine or TC30903 and (L5P) Duramax 6.6L Turbo-Diesel V8 engine. Requires single rear wheels.)
• Air filter, heavy-duty
• Air filtration monitoring
• Transfer case, two-speed electronic shift with push button controls (Requires 4WD models.)
• Auto-locking rear differential
• Four wheel drive
• Cooling, external engine oil cooler
• Cooling, auxiliary external transmission oil cooler
• Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr maintenance-free with rundown protection and retained accessory power (Included and only available with (L8T) 6.6L V8 gas engine.)
• Alternator, 170 amps (Requires (L8T) 6.6L V8 gas engine.)
• Recovery hooks, front, frame-mounted, Black
• Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section
• Suspension Package (Not available with (X31) Off-Road Package.)
• Steering, Recirculating Ball with smart flow power steering system
• Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
• Brake lining wear indicator
• Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine. Not included with (ZW9) pickup bed delete.)

EXTERIOR (18)

• Single Rear Wheels
• Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door (Deleted with (ZW9) pickup bed delete.)
• Bumper, front chrome lower
• Bumper, rear chrome with bumper CornerSteps
• CornerStep, rear bumper
• Bed Step, Black integrated on forward portion of bed on driver and passenger side (Not available with (ZW9) pickup bed delete.)
• Moldings, beltline, Black
• Cargo tie downs (12), fixed, rated at 500 lbs per corner
• Grille, Chrome surround with Black mesh
• Taillamps, LED tail and SRW are incandescent stop, turn and reverse light and DRW are LED stop, turn and reverse light
• Lamps, cargo area, cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel
• Mirrors, outside high-visibility vertical trailering lower convex mirrors, manual-folding/extending (extends 3.31" [84.25mm]), molded in Black
• Glass, solar absorbing, tinted
• Door handles, Black grained
• Tailgate, standard (Deleted with (ZW9) pickup bed delete.)
• Tailgate and bed rail protection caps, top (Deleted with (ZW9) pickup bed delete.)
• Tailgate, locking, utilizes same key as ignition and door (Included and only available with (QK1) standard tailgate. Deleted with (ZW9) pickup bed delete.)
• Tailgate, gate function manual, no lift assist (Deleted with (ZW9) pickup bed delete.)

ENTERTAINMENT (1)

• Audio system feature, 6-speaker system (Requires Crew Cab or Double Cab model.)

INTERIOR (13)

• Seat adjuster, driver 4-way manual
• Seat adjuster, passenger 4-way manual
• Seat, rear 60/40 folding bench (folds up), 3-passenger (includes child seat top tether anchor) (Not available with Regular Cab model.)
• Steering wheel, urethane
• Steering column, Tilt-Wheel, manual with wheel locking security feature
• Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure
• Driver Information Center, 3.5" diagonal monochromatic display
• Exterior Temperature Display located in radio display
• Power outlet, front auxiliary, 12-volt
• Air conditioning, single-zone
• Air vents, rear (Not available with Regular Cab model.)
• Mirror, inside rearview, manual tilt
• Assist handles, front A-pillar mounted for driver and passenger, rear B-pillar mounted