2021 GMC Sierra 2500HD 4WD Crew Cab 159" SLT

Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)

GVWR, 10,650 lbs. (4831 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels or TK20943 and (L8T) 6.6L V8 gas engine with 17" wheels.)

Transfer case, two-speed active, electronic Autotrac with push button control (Requires 4WD models.)

Auto-locking rear differential

Four wheel drive

Cooling, external engine oil cooler

Cooling, auxiliary external transmission oil cooler

Air filter, heavy-duty

Air filtration monitoring

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.)

Trailer brake controller, integrated

In-vehicle Trailering App, System includes checklist, trailer maintenance reminders, trailer security alerts, trailer mileage, tow/haul reminder, trailer electrical diagnostics and Trailer Tire Pressure Monitor System module (Includes trailer tire pressure monitoring alert ONLY when (PTT) trailer tire pressure monitor system is factory ordered and sensors are installed. With (ZW9) pickup bed delete no provision for a trailer tire pressure monitor system will exist but all the other (U1D) features will remain.)

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, Digital Variable Steering Assist This system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue

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.)

Tire, spare LT275/70R18 all-terrain, blackwall (Included and only available with (QF6) LT275/70R18E all-terrain, blackwall tires or (QF9) LT275/65R20 all-terrain, blackwall tires with (E63) pickup bed models. Available to order when (ZW9) pickup bed delete and (QF6) LT275/70R18E all-terrain, blackwall tires are ordered.)

Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door

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

Cargo tie downs (12), fixed rated at 500 lbs per corner

Wheelhouse liners, rear

Moldings, beltline, stainless steel

Grille (Chrome surround with high gloss Black mesh and Chrome inserts.)

Fog lamps, LED

Lamps, cargo area cab mounted integrated with center high mount stop lamp, with switch in bank on left side of steering wheel

LED Cargo Area Lighting located in cargo bed activated with switch on center switch bank or key fob

Taillamps, LED signature taillight with LED stop and reverse light

Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger) lower convex mirrors, turn signal indicators, puddle lamps, perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm])

Mirror caps, chrome

Glass, deep-tinted

Door handles, chrome

Tailgate, GMC MultiPro Tailgate with six functional load/access features

Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light

Tailgate and bed rail protection caps, top

Radio, HD

Audio system feature, 6-speaker system

4G LTE Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.com or dealer for details.)

Seat adjuster, driver 10-way power including lumbar

Seat adjuster, passenger 10-way power including lumbar

Driver memory recalls driver "presets" for power driver seat and outside mirrors

Seat, Up-level Rear with Storage Package, 60/40 folding bench for Crew Cab models, includes full-length bench seat, seatback storage on left and right side, center fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)

Floor covering, color-keyed carpeting

Steering wheel, leather-wrapped

Steering wheel, heated

Steering wheel audio controls

Steering column, manual Tilt-Wheel and telescoping

Steering column, lock control, electrical

Instrument cluster, 6-gauge cluster featuring speedometer, fuel level, engine temperature, tachometer, voltage and oil pressure

Driver Information Center, 4.2" diagonal color display includes driver personalization

Exterior Temperature Display, located in radio display

Compass, located in instrument cluster

Rear Seat Reminder

Remote vehicle starter system

Cruise control, steering wheel-mounted

Theft-deterrent system, unauthorized entry

Power outlet, instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)

USB ports, dual, charge-only (2nd row)

Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)

Air conditioning, dual-zone automatic climate control

Air vents, rear

Mirror, inside rearview auto-dimming

Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted

GMC Connected Access capable (Subject to terms. See onstar.com or dealer for details)

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

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