2026 GMC Sierra 1500 AT4



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Vehicle Information

VIN: 3GTUUEEL6TG263258
Stock #: 56236
  • Body Style Crew Cab Pickup
  • Exterior Color Coastal Dune
  • Interior Color Jet Black With Kalahari Accents
  • Fuel Economy
    City/Highway 14/17 MPG
  • Engine 8 Cylinder Engine
  • Transmission 10-SPEED AUTOMATIC WITH ELECTRONIC PRECISION SHIFT, ELECTRONICALLY CONTROLLED
  • Fuel Type Gasoline Fuel

Highlighted Features

Feature availability subject to final vehicle configuration. Please reference window sticker for more info.
  • Adaptive Cruise Control
  • Remote Start
  • 4WD/AWD
  • Wireless Phone Charging
  • Blind Spot Monitor
  • Parking Assistance
  • Automatic Climate Control
  • Turbo Charged Engine

Dealer Comments

Driving Good. Together.
At Harry Brown's, that isn't just a slogan - it's how we do business every day. When you choose this Coastal Dune 2026 GMC Sierra 1500 AT4, you're choosing a dealership built on trust, transparency, and long-term relationships. Our customers come back because they know they'll be treated right, from the first conversation to every mile down the road.





What this vehicle includes:

AT4 Premium Package ($1,045 value)

  • Off-Road High Clearance Step

Technology Package ($1,525 value)

  • Rear Camera Mirror
  • Multicolor 15"" Diagonal Head-Up Display
  • Bed View Camera

Preferred Equipment Group 4SB

  • Power Front Passenger Windows with Express Up/down
  • Power Rear Windows with Express Down
  • Deep-Tinted Glass
  • Power Door Locks
  • Keyless Open and Start
  • Power Front Windows with Driver Express Up/down
  • Rear Wheelhouse Liners
  • Color-Keyed Carpeting Floor Covering
  • Front Premium Floor Liners with Removable Carpet Insert
  • Push Button Start
  • Remote Vehicle Starter System
  • Electric Rear-Window Defogger
  • Front Rain-Sensing Wipers
  • Spray-On Pickup Bedliner with GMC Logo
  • Floor-Mounted Center Console
  • Auto-Locking Rear Differential
  • Black Chrome Grille Insert Bars
  • Hill Descent Control
  • Integrated Trailer Brake Controller
  • Heavy-Duty Air Filter
  • Wireless Charging
  • Heated Driver and Front Outboard Passenger Seating
  • Heated 2nd Row Outboard Seats
  • 120-Volt Interior Power Outlet
  • Ventilated Driver and Front Passenger Seats
  • 220 Amp Alternator
  • Power Rake and Telescoping Steering Column
  • 2-Speed Transfer Case
  • 20"" X 9"" Machined Aluminum Wheels
  • Skid Plates
  • GMC Pro Safety
  • Hitch View
  • Trailer Camera Provisions
  • Perimeter Lighting
  • SiriusXM with 360L Trial Subscription
  • 2 Charge/data USB Ports Inside Center Console
  • 2 USB Ports
  • 2 type-C Charge-Only Rear USB Ports
  • Ultrasonic Front and Rear Park Assist
  • OnStar Services Capable
  • In-Vehicle Trailering System App
  • LED Cargo Area Lighting
  • Rear Cross Traffic Braking
  • Red Recovery Hooks
  • Steering Wheel Audio Controls
  • Rear Pedestrian Detection
  • Trailer Side Blind Zone Alert
  • Premium Bose 7-Speaker Sound System
  • Theft Deterrent System (unauthorized Entry)
  • HD Surround Vision
  • Wi-Fi Hotspot Capable
  • Off-Road Suspension
  • Trailering Package

AT4 Preferred Package

  • Power Sliding Rear Window with Rear Defogger
  • Universal Home Remote


Safety and Security

  • Forward collision mitigation - Forward thinking. You look away for just a second and suddenly the vehicle in front of you has stopped. That's when the forward collision mitigation system comes to life. When it senses an impending impact, it will activate a combination of features to help prevent or reduce the severity of an accident. Forward collision mitigation is always looking ahead.
  • Pedestrian impact prevention - An extra step toward safety. Pedestrians don't always stop, look, and listen, but with Pedestrian Impact Prevention, your vehicle is equipped to better see them and avoid them. This system constantly monitors the road ahead to identify and track pedestrians. It projects that image to an interior display screen, AND should an impact become likely, Pedestrian impact prevention takes steps to avoid a collision.
  • Rear camera - Watching your back! The rear camera helps you see obstacles and hazards you otherwise couldn't by showing enhanced images of what is behind you. The rear camera is an extra set of eyes that's both convenient and safe.

Technology and Telematics

  • Apple CarPlay/Android Auto smart device wireless mirroring
  • Mobile hotspot - WiFi on the fly. Connect your devices to the Internet through your vehicle's private mobile hotspot and take the internet wherever your journey takes you, without eating up your data allowance. Find the hotspot with mobile hotspot.

EMISSIONS, FEDERAL REQUIREMENTS, ENGINE, 6.2L ECOTEC3 V8, TRANSMISSION, 10-SPEED AUTOMATIC WITH ELECTRONIC PRECISION SHIFT, ELECTRONICALLY CONTROLLED, GVWR, 7100 LBS. (3221 KG), REAR AXLE, 3.23 RATIO, WHEELS, 20"" X 9"" (50.8 CM X 22.9 CM) MACHINED ALUMINUM, TIRES, 275/60R20SL ALL-TERRAIN, BLACKWALL, TIRE, SPARE 255/80R17SL ALL-SEASON, BLACKWALL, COASTAL DUNE, SEATS, FRONT BUCKET, JET BLACK WITH KALAHARI ACCENTS, PERFORATED LEATHER FRONT SEAT TRIM, AUDIO SYSTEM, 13.4"" DIAGONAL PREMIUM GMC INFOTAINMENT SYSTEM WITH GOOGLE BUILT IN APPS SUCH AS NAVIGATION AND VOICE ASSISTANCE, INCLUDES COLOR TOUCH-SCREEN, MULTI-TOUCH DISPLAY, AM/FM STEREO, AT4 PREMIUM PACKAGE, TECHNOLOGY PACKAGE, AT4 PREFERRED PACKAGE, COOLING, EXTERNAL ENGINE OIL COOLER, COOLING, AUXILIARY EXTERNAL TRANSMISSION OIL COOLER, ALTERNATOR, 170 AMPS, ACTIVE EXHAUST, DUAL, SPORT-MODE ENABLED, LPO, OFF-ROAD HIGH CLEARANCE STEPS, WINDOW, POWER, REAR SLIDING WITH REAR DEFOGGER, LICENSE PLATE KIT, FRONT, MULTICOLOR 15"" DIAGONAL HEAD-UP DISPLAY, UNIVERSAL HOME REMOTE, REAR CAMERA MIRROR, INSIDE REARVIEW AUTO-DIMMING, BED VIEW CAMERA


Whether you're just starting your search or ready for a test drive, our team is here to help. Stop by Harry Brown's at 1747 Grant Street Faribault MN 55021 or call 507-333-1200.

At Harry Brown's, we're proud to help you keep Driving Good. Together.



All Features

  • Trailering Package includes trailer hitch
  • 7-pin and 4-pin connectors and (CTT) Hitch Guidance
  • Rear axle
  • 3.23 ratio
  • Pickup bed
  • GVWR
  • 7200 lbs. (3266 kg) (Requires TK10*43 Crew Cab 4WD model with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
  • Air filter
  • heavy-duty
  • Automatic Stop/Start
  • Hill Descent Control
  • Auto-locking rear differential
  • Transfer case
  • two-speed
  • electronic Autotrac with push button control (4WD models only)
  • Suspension
  • Off-Road with 2" factory installed lift and monotube shocks
  • Four wheel drive
  • Alternator
  • 220 amps (Included and only available with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
  • Battery
  • heavy-duty 850 cold-cranking amps/95 Amp-hr
  • maintenance-free with rundown protection and retained accessory power (Included and only available with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
  • Frame
  • fully-boxed
  • hydroformed front section
  • Trailer brake controller
  • integrated
  • Recovery hooks
  • Red
  • Skid plates
  • Cargo tie downs (12)
  • fixed
  • Steering
  • Electric Power Steering (EPS) assist
  • rack-and-pinion
  • Brakes
  • 4-wheel antilock
  • 4-wheel disc with DURALIFE rotors
  • Brake lining wear indicator
  • Capless Fuel Fill
  • Exhaust
  • dual system (Includes chrome exhaust tips. Not available with (L87) 6.2L EcoTec3 V8 engine.)
  • Exhaust
  • aluminized stainless-steel muffler and tailpipe
  • Wheel
  • 17" x 8" (43.2 cm x 20.3 cm) full-size
  • steel spare
  • Wheelhouse liners
  • rear (Deleted with (PCP) AT4 CarbonPro Edition.)
  • Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
  • Bumper
  • front
  • body-color lower
  • Bumper
  • rear body-color with corner steps
  • CornerStep
  • rear bumper
  • Grille (Black chrome grille insert bars with gloss black header and accents.)
  • Fog lamps
  • LED
  • Lighting
  • perimeter
  • Taillamps
  • LED LED signature taillight with LED stop
  • turn & reverse and Fade-on/Fade-off animation
  • Mirror caps
  • high gloss Black
  • Wipers
  • front rain-sensing
  • Glass
  • deep-tinted
  • 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
  • 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
  • Door handles
  • body-color
  • Bedliner
  • Spray-on Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel) (Deleted with (PCP) AT4 CarbonPro Edition. Crew Cab models are available with Ship Thru codes (VCO)
  • (VDT)
  • (VYC) or (VYS).)
  • Steering wheel audio controls
  • Seat adjuster
  • driver 10-way power including lumbar
  • Seat adjuster
  • passenger 10-way power including lumbar
  • 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)
  • Seats
  • heated second row outboard seats
  • Center Console
  • floor-mounted with cup holders
  • cell phone storage
  • power cord management
  • hanging file folder capability
  • Floor covering
  • color-keyed carpeting
  • Steering column
  • power rake and telescoping
  • Steering wheel
  • wrapped
  • Steering wheel
  • heated
  • Driver Information Center
  • enhanced
  • 12.3" diagonal reconfigurable multicolor digital display
  • GMC Premium information Display- 13.4" diagonal Multicolor touch screen
  • 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
  • Compass
  • located in instrument cluster
  • Exterior Temperature Display
  • located in radio display
  • Remote vehicle starter system
  • ADAPTIVE CRUISE CONTROL
  • Theft-deterrent system
  • unauthorized entry
  • Steering column lock
  • electrical
  • Wireless Charging
  • Power outlet
  • interior power outlet
  • 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) interior power outlet)
  • Air conditioning
  • dual-zone automatic climate control
  • Air vents
  • rear
  • 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 View with image adjustment
  • Pan/Zoom/Tilt
  • Hitch Guidance
  • TRAILER CAMERA PROVISIONS AND TRAILER VIEWING SOFTWARE
  • Front and Rear Park Assist
  • Ultrasonic
  • Following Distance Indicator (Included and only available with (PDI) GMC Pro Safety.)
  • Trailer Side Blind Zone Alert
  • Rear Cross Traffic Braking
  • Rear Pedestrian Alert
  • Safety Alert Seat (Included and only available with (PDI) GMC Pro Safety.)
  • 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) GMC Pro Safety.)
  • Rear seat reminder
  • Rear Seat Belt Indicator

May not represent actual vehicle. (Options, colors, trim and body style may vary)