2026 GMC Sierra 2500HD AT4X

Dealership Vehicle Description
Performance & Specs
Interior
Exterior
Safety

Built for serious work and real off-road confidence, this 2026 GMC Sierra 2500 At4x brings heavy-duty diesel strength to every drive. Finished in Black with a Black interior, this four-door pickup pairs a bold look with practical capability. At Steele Chevrolet Buick GMC in Dartmouth, this Sierra 2500 At4x stands out for drivers who need power, traction, and everyday usability.

With its automatic transmission, 4 roues motrices system, and Turbocharged Diesel V8 6.6L engine, this 2026 GMC Sierra 2500 At4x is ready for demanding jobs, rough weather, and long highway pulls. The included engine block heater adds welcome cold-season convenience for Atlantic Canadian conditions, helping make early starts easier when temperatures drop.

FEATURES OF THE Sierra 2500 At4x

Heavy-duty off-road focused pickup design
Turbocharged 6.6L diesel V8 power
Four-door crew-friendly cabin layout
Standard four-wheel-drive capability included

TRUCK FEATURES

Built for towing and hauling confidence
Strong diesel torque for heavy loads
Pickup bed supports versatile cargo use
Four-wheel drive aids rough terrain

ADVANCED SAFETY FEATURES

Four-wheel drive adds traction in weather
Heavy-duty build inspires secure road feel
Elevated ride height improves outward visibility
Four-door layout supports easy passenger access

PERFORMANCE AND EFFICIENCY

Turbocharged diesel V8 delivers strong torque
Automatic transmission supports smooth power delivery
Four-wheel drive boosts off-road capability
Engine block heater helps cold starts

COMFORT AND CONVENIENCE

Spacious cabin supports daily driving comfort
Four full doors improve cabin access
Black interior offers a clean look
Practical layout suits work and travel

TECHNOLOGY AND CONNECTIVITY

Driver-focused controls support easy operation
Clear instrument layout aids quick checks
Modern truck design supports daily usability
Cabin arranged for simple functionality

CARGO SPACE

Pickup bed handles tools and equipment
Large cargo area suits weekend projects
Bed space supports bulky item transport
Cabin adds room for personal gear

WHAT OTHER OWNERS LIKE

Strong diesel pulling power under load
Confident four-wheel-drive traction year-round
Useful cabin space for passengers
Heavy-duty capability for work and recreation

The 2026 GMC Sierra 2500 At4x is a smart choice for drivers who want a premium heavy-duty truck with real capability. Its 6.6L Turbocharged Diesel V8 is known for strong low-end torque, which is especially useful for towing, hauling, and climbing with confidence. Paired with an automatic transmission, it delivers steady performance that feels composed on the highway and capable on uneven ground.

The Black exterior gives this 2026 GMC Sierra 2500 At4x a clean, purposeful look that suits its rugged character. Inside, the Black interior keeps the cabin refined and easy to maintain. The four-door configuration also makes this truck practical for both jobsite use and family travel, with easier access for passengers and gear.

Drivers shopping at Steele Chevrolet Buick GMC in Dartmouth will appreciate how this 2026 GMC Sierra 2500 At4x balances hard-working ability with day-to-day comfort. The 4 roues motrices system helps provide dependable traction when roads turn slippery or trails get loose, while the engine block heater adds valuable convenience during cold Maritime mornings.

For those who need a heavy-duty pickup that can handle demanding tasks without giving up comfort or presence, this 2026 GMC Sierra 2500 At4x is ready to deliver. It offers the toughness expected from a serious truck, the strength of diesel power, and the flexibility to move from workday duty to weekend adventure with ease.

This 2026 GMC Sierra 2500 At4x's VIN is: 1GT4UZEY6TF340358.

Air filter
heavy-duty
Air filtration monitoring
Alternator
170 amps (Requires (L8T) 6.6L V8 gas engine.)
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.)
Brake lining wear indicator
Brakes
4-wheel antilock, 4-wheel disc with DURALIFE rotors
Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
Cooling
auxiliary external transmission oil cooler
Cooling
external engine oil cooler
Differential
driver-selectable full-locking rear, e-locking
Four wheel drive
Frame
fully-boxed, hydroformed front section and a fully-boxed stamped rear section
GVWR
11,025 lbs. (5001 kg) (Included and only available with TK20743 model and (L8T) 6.6L V8 gas engine with 18, 20 or 22 wheels.)
Hill Descent Control
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.)
Pickup bed includes bed assist step
Push Button Start
Rear axle
3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
Recovery hooks
Red (Deleted with (ULV) AT4X AEV Edition.)
Skid Plates
front aluminum
Skid Plates
Transfer case, steel
Steering
Digital Variable Steering Assist this system automatically adjusts steering based on speed, road conditions, and other inputs to reduce driver effort and fatigue
Suspension
Off-Road Includes, 1.5 suspension lift: front suspension lift composed of: Control Arms, Ball Joints, Knuckles, DSSV Dampers, rear suspension lift composed of spacer block and DSSV Dampers and Half shafts w/ revised joints, 3-stage Leaf springs from 3500
Trailer brake controller
integrated
Transfer case
two-speed active, electronic Autotrac with push button control

Adaptive Cruise Control
Air conditioning
dual-zone automatic climate control
Air vents
rear
Assist handles front A-pillar mounted for driver and passenger
rear B-pillar mounted
Audio System
13.4 diagonal Premium GMC Infotainment System with Google built in apps such as navigation and voice assistance includes colour touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring wireless Android Auto and Apple CarPlay capability for compatible phones
Bluetooth for phone connectivity to vehicle infotainment system
Bose Premium Series with 12-speaker system with Centerpoint Richbass woofer and AudioPilot
Centre Console
floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
Compass
located in instrument cluster
Defogger
rear-window electric
Door locks
power
Driver Information Centre
enhanced, 12.3 diagonal reconfigurable multicolour digital display
Driver memory recalls driver presets for power driver seat and outside mirrors
Exterior Temperature Display
located in radio display
Floor covering
colour-keyed carpeting
GMC Premium information Display- 13.4 diagonal Multicolour touch screen
Keyless Open and Start includes remote keyless entry
LPO
MultiPro Tailgate Audio System by Kicker
Multicolour 15 Diagonal Head-Up Display
Power outlet
bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
Power outlet
instrument panel, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
Premium Floor Liners with removable carpet insert
front
Premium Floor Liners with removable carpet insert
rear
Rear Camera Mirror inside rearview auto-dimming with full camera display
Rear Seat Reminder
Remote vehicle starter system
Seat adjuster
driver 16-way power including lumbar and massage
Seat adjuster
passenger 16-way power including lumbar and massage
Seat trim
Full Grain Leather
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, centre fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
Seating
heated driver and front outboard passenger
Seats
front bucket with centre console
Seats
heated second row outboard seats
Seats
ventilated driver and front passenger
SiriusXM Trial Subscription
SiriusXM with 360L Trial Subscription. SiriusXM with 360L transforms your customers' ride with our most extensive and personalized radio experience on the road. (IMPORTANT: The SiriusXM trial subscription is not provided on vehicles that are ordered for Fleet Daily Rental (FDR) use. Certain features and/or content may not be available unless an active data connection is enabled in the vehicle. Content varies by SiriusXM subscription plan. Features and display may vary by vehicle. All SiriusXM services require a subscription
sold separately by SiriusXM after the trial period. Your SiriusXM service will automatically stop at the end of your trial unless you decide to subscribe. If you decide to continue service after your trial, the subscription plan you choose will continue for an indeterminate term and you will be charged according to your chosen payment method at the then current rates unless and until you cancel. Taxes apply. Please see the SiriusXM Customer Agreement at siriusxm.ca/terms for complete terms and how to cancel, which includes calling SiriusXM at 1-888-539-7474. All rates, content, and programming are subject to change. SiriusXM uses personal information in accordance with SiriusXM Privacy Policy, available at siriusxm.ca/privacy. SiriusXM Canada Inc. SiriusXM, the SiriusXM logo, channel names and logos are trademarks of Sirius XM Radio Inc. and are used under license.)
Steering column
manual Tilt-Wheel and telescoping
Steering wheel audio controls
Steering wheel
heated
Steering wheel
leather-wrapped
Theft-deterrent system
unauthorized entry
Universal Home Remote
USB ports
(2) charge-only, rear
USB Ports
2 (first row) located on console
USB Ports
2, Charge/Data ports located inside centre console
Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.ca or dealer for details.)
Window
power front, passenger express up/down
Window
power, rear sliding with rear defogger
Windows
power front, drivers express up/down
Windows
power rear, express down
Wireless Charging
Wireless phone projection for Apple CarPlay and Android Auto

Assist steps
power retractable, Black includes LED lighting (Not available with any other assist steps.)
Bed Step
Black integrated on forward portion of bed on driver and passenger side
Bedliner
Spray-on, Pickup bedliner with GMC logo (does not include spray-on liner on tailgate due to Black composite inner panel)
Bumper
front, body-colour lower (Bumper color will be High Gloss Black.)
Bumper
rear body-colour with bumper CornerSteps (Bumper color will be High Gloss Black.)
Cargo tie downs (12)
fixed, rated at 500 lbs (226.8 kg) per corner
CornerStep
rear bumper (Not available with (ULV) AT4X AEV Edition.)
Door handles
body-colour (With (ULV) AT4X AEV Edition door handles will be Gloss black.)
Fog lamps
LED
Glass
deep-tinted
Grille (Gloss Black header and grille insert bars with Dark Nickel inserts.)
Headlamps
Animated LED projectors LED turn signals and Daytime Running Lamps
IntelliBeam
automatic high beam on/off (Included and only available with (PDI) Sierra HD Pro Safety.)
Lamps
cargo area cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
Lamps
Smoked Amber roof marker, (LED)
LED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fob
Mirror caps
high gloss Black
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
Mouldings
beltline, Black
Sunroof
power
Tailgate and bed rail protection caps
top
Tailgate
gate function manual with EZ Lift includes power lock and release, includes hitch area light
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
Taillamps
Animated LED Signature Tail, Stop, turn and Reverse lamps
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
Tire
spare, LT305/70R18-126/123R, 35 M/T
Tires
LT305/70R18-126/123R, 35 M/T
Wheel
Spare 18 (50.8 cm)
Wheelhouse liners
rear
Wheels
18 (45.7 cm) machined aluminum wheel with High Gloss black accents
Wipers
front rain-sensing

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
Automatic Emergency Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
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
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.)
Daytime Running Lamps
LED signature lighting
Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
Front and Rear Park Assist
ultrasonic
Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
HD Surround Vision provides the driver with an overhead view of the scene around the vehicle on a centre stack display. Includes front camera washer.
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
Hitch Guidance with Hitch View with image adjustment
Pan/Zoom/Tilt
Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
LED Signature DRL's
OnStar Basics (OnStar Fleet Basics for Fleet) Drive more confidently with up to 8 years of core OnStar services including mobile app commands
connectivity for select apps that provide in-vehicle voice assistance and navigation with real-time traffic, and Automatic Crash Response. (Requires (UE1) OnStar. Term begins on vehicle delivery date. Paid subscription required after expiry. Services are dependent on compatible wireless networks provided by third-party wireless service providers, working vehicle electrical systems, GPS signal and other factors outside GM control. Changes in technology and wireless networks may limit or prevent the operation of certain services. Services, connectivity, and capabilities have additional terms and limitations and are subject to change, and will vary by model, vehicle configuration, software version, conditions, and geographical and technical restrictions. Compatible smartphone required for mobile app commands. Not all vehicles may transmit all crash data; OnStar links to emergency services; Voice and Maps apps are subject to change at any time and may be provided by third parties. Non-refundable and no cash value. See onstar.ca/en/info for terms and details.)
OnStar services capable (See onstar.ca for details and limitations. Services vary by model. Service plan required.)
Rear Cross Traffic Alert
Rear Seat Belt Indicator
Safety Alert Seat
Seat Belt Adjustable Guide Loops
front row only
StabiliTrak
stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob
to help encourage safe driving behaviour. 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
auto learn includes Tire Fill Alert (does not apply to spare tire)
Trailer Camera Provisions and trailer viewing software
Trailer Side Blind Zone Alert
Trailer Tire Pressure Monitor Sensors includes set of 4 sensors. Sensor functionality requires (UET) In-Vehicle Trailering App to be ordered with the vehicle and installed by the factory. Sensors will be shipped loose with the truck and will need to be installed on trailer by customer. System is capable of monitoring up to 6 wheels. Additional or replacement sensors are available through GM Accessories
Trailering Information Label provides max trailer ratings for tongue weight
conventional, gooseneck and 5th wheel trailering