Used 2026 GMC Sierra AT4

AT4 Premium Plus Package: Power Sunroof; Technology Package; Power-Retractable Black Assist Steps

Preferred Equipment Group 4SB: LED Cargo Area Lighting; Trailer Side Blind Zone Alert; SiriusXM with 360L Trial Subscription; Remote Vehicle Starter System; Safety Alert Seat; Ultrasonic Front and Rear Park Assist; Trailer Cam Provisions and Trailer Viewing Software; Electric Rear-Window Defogger; Floor-Mounted Center Console; Gloss Black Header Grille and Grille Insert Bars; Unauthorized Entry Theft-Deterrent System; Bed View Camera with Two Trailer Camera Provisions; Front Rain-Sensing Wipers; Sierra HD Pro Safety; Wireless Phone Projection; 2 USB Ports; Rear Cross Traffic Alert; 120-Volt Instrument Panel Power Outlet; 2 Charge/data USB Ports Inside Center Console; Heated Driver and Front Outboard Passenger Seats; Wireless Charging; X31 Off-Road Package; Front Premium Floor Liners with Removable Carpet Insert; Steering Wheel Audio Controls; Rear Premium Floor Liners with Removable Carpet Insert; 2 Charge-Only Rear USB Ports; OnStar Services Capable; 120-Volt Bed Mounted Power Outlet; Heated 2nd Row Outboard Seats; Power Front Passenger Windows with Express Up/down; Bose Premium 7-Speaker Sound System; 2-Speed Active Transfer Case; Deep-Tinted Glass; 6.6L V8 with Direct Injection and Variable Valve Timing Engine; Spray-On Pickup Bedliner with GMC Logo; HD Surround Vision; Ventilated Driver and Front Passenger Seats; Manual Tilt-Wheel/telescoping Steering Column; Keyless Open and Start; ProGrade Trailering System; Push Button Start; Rear Wheelhouse Liners

AT4 Preferred Package: Power Sliding Rear Window with Defogger; LED Smoked Amber Roof Marker Lamps; Universal Home Remote

Power-Retractable Black Assist Steps

Technology Package

Power Sunroof

Gooseneck/5th Wheel Prep Package

Coastal Dune

LT275/65R20E 126/123 Off-Road T/A KO3 Tires

LED Smoked Amber Roof Marker Lamps

Trailer Tire Pressure Monitor Sensors

Apple CarPlay/Android Auto smart device wireless mirroring

Forward Collision Alert with Automatic Braking

Front Pedestrian Braking

Wi-Fi Hotspot capable mobile hotspot internet access

HD Rear Vision Camera w/Hitch View rear mounted camera

Adaptive cruise control

Head-up display

Automatic Emergency Braking brake assist system

Cruise control with steering wheel mounted controls

Ventilated driver and front passenger seats

Keyfob remote start

Heated steering wheel

Heated driver and front passenger seats

Heated rear seats

Leather front seat upholstery

Primary monitor touchscreen

Lane Departure Warning

Rear Cross-Traffic Alert collision warning

First-row sliding and tilting glass sunroof with power 1-touch activation sunshade

Driver seat power reclining

lumbar support

cushion tilt

fore/aft control and height adjustable control

AutoTrac part and full-time 4WD

6.6L V-8 direct injection

variable valve control

regular gasoline

engine with 401HP

6.6L V-8

Front wireless smart device charging

Google Built-In built-in virtual assistant

Teen Driver restricted driving mode/alerts

Keyless Open/Keyless Start with hands-free access and push button start

Keyfob window control

HD Surround Vision w/Hitch View aerial view camera

Smart device remote start

Push-button

GCW Alert weight capacity alert

Video-feed rearview mirror

Stolen Vehicle Assistance vehicle tracker with vehicle slowdown

Bluetooth wireless audio streaming

Hitch Guidance vehicle to trailer hitching assist

Gauge cluster display size: 12.30

Front mounted camera with washer

Right side camera

Pickup box camera

Left side camera

Trailer Side Blind Zone Alert blind spot warning

Trailer tire pressure and temperature sensors

Trailer light test

Trailer light malfunction warning

Trailer theft alarm

Dual-zone front climate control

Full gauge cluster screen

Auto high-beam headlights

Immobilizer

X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks

ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App

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, 10,850 lbs. (4921 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18", 20" or 22" wheels.)

Hill Descent Control

Transfer case, two-speed active, electronic Autotrac with push button control

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 when (PTT) trailer tire pressure monitor sensors are installed.)

Recovery hooks, Red

Skid Plates protect the oil pan, front axle and transfer case

Frame, fully-boxed, hydroformed front section and a fully-boxed stamped rear section

Suspension, Off-Road includes twin-tube shocks

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.)

Tire, spare LT275/70R18 all-terrain, blackwall

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

Bumper, front, body-color lower

Bumper, rear body-color with bumper CornerSteps

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

CornerStep, rear bumper

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

Wheelhouse liners, rear

Moldings, beltline, Black

Grille (Gloss Black header and grille insert bars with Black Chrome accents.)

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, Animated LED Signature Tail, Stop, turn and Reverse lamps

Mirrors, outside power-adjustable vertical trailering with heated and auto-dimming upper glass, (driver and passenger), lower convex mirrors, turn signal indicators, puddle lamps, (U12) perimeter lighting, auxiliary lighting, power folding/extending (extends 3.31" [84.25mm]) lighting

Mirror caps, high gloss Black

Glass, deep-tinted

Wipers, front rain-sensing

Door handles, body-color

Tailgate, GMC MultiPro Tailgate with six functional load/access features NOTE: Auto release can be disabled if ball hitch is installed. See Owner's manual for details

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

Tailgate and bed rail protection caps, top

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

Seat, Up-level Rear with Storage Package 60/40 folding bench, 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)

Seat adjuster, driver 10-way power including lumbar

Seat adjuster, passenger 10-way power including lumbar

Seats, heated second row outboard seats

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

Center Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability

Floor covering, color-keyed carpeting

Steering wheel, wrapped

Steering wheel, heated

Steering wheel audio controls

Steering column, manual Tilt-Wheel and telescoping

Driver Information Center, enhanced, 12.3" diagonal reconfigurable multicolor digital display

Rear Seat Reminder

GMC Premium information Display- 13.4" diagonal Multicolor touch screen

Exterior Temperature Display, located in radio display

Compass, located in instrument cluster

Remote vehicle starter system

Adaptive Cruise Control

Wireless Charging

Theft-deterrent system, unauthorized entry

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

USB ports, (2) charge-only, rear

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

Air vents, rear

Air conditioning, dual-zone automatic climate control

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.)

Front and Rear Park Assist, ultrasonic

Bed View Camera, camera in the CHMSL to show a view of the cargo bed display located in infotainment screen, includes Two Trailer Camera Provisions

Trailer Camera Provisions and trailer viewing software

Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching

Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)

Rear Seat Belt Indicator

Rear Cross Traffic Alert

Trailer Side Blind Zone Alert

Seat Belt Adjustable Guide Loops, front row only

Buckle to Drive prevents vehicle from being shifted out of Park until driver seat belt is fastened; times out after 20 seconds and encourages seat belt use (Included and only available with (PDI) Sierra HD Pro Safety.)

Safety Alert Seat

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

Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering