2020 GMC Sierra 2500HD 4WD Crew Cab 159"

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

GVWR, 10,450 lbs. (5012 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 17" wheels, or TK20903 model and (L8T) 6.6L V8 gas engine with 18" or 20" wheels.)

Transfer case, two-speed, electronic shift with push button controls (Requires 4WD models.)

Differential, heavy-duty locking rear

Four wheel drive

Cooling, external engine oil cooler

Cooling, auxiliary external transmission oil cooler

Air filter, high-capacity

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.)

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.)

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

BedStep, Black integrated on forward portion of bed on driver and passenger side

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

Moldings, beltline, Black

Grille (Chrome surround with Black mesh.)

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

LED tail and incandescent stop, turn and reverse light

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, locking utilizes same key as ignition and door

Tailgate, standard

Tailgate, gate function manual, no lift assist

Tailgate and bed rail protection caps, top

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

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

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

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

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

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