Vehicle Details
Body Style
Truck
Engine
6.6L 8Cyl
Exterior Colour
White
Interior Colour
Black
Transmission
Automatic
Drivetrain
4×4
Stock
26HD121
Fuel Type
Diesel
Trim Details
Crew Cab Standard Box 4-Wheel Drive AT4
Description
Feast your eyes on the stunning new 2026 GMC Sierra 2500HD AT4 in a pristine summit white finish. This rugged yet refined truck comes equipped with a robust 4x4 drivetrain and the precision handling you'd expect from a GMC. The powerhouse under the hood is a formidable 6.6L Duramax turbo-diesel V8 engine, delivering 470 horsepower and 975 lb-ft of torque, making it ideal for those demanding tasks and ambitious adventures.
The Sierra 2500HD OS's imposing exterior is perfectly matched with impressive 20-inch high gloss black aluminum wheels and all-terrain blackwall tires. The AT4 Premium Plus Package enhances the truck with stylish and functional additions such as the high clearance step and power sunroof. The assist steps are power-retractable, boasting LED lighting to guide your way.
Inside, the Jet Black interior with Kalahari accents exudes comfort and class. You'll appreciate the premium interior features like leather seats and a power sliding rear window with defogger. The power-adjustable front bucket seats are both heated and cooled to ensure year-round comfort.
The technology in this vehicle sets a new standard for innovation and convenience. The centerpiece is the 13.4-inch diagonal premium GMC infotainment system with a color touch-screen, complete with wireless Android Auto and Apple CarPlay. Stay connected with peace of mind, thanks to a built-in Wi-Fi hotspot and the cutting-edge Technology Package that includes a multicolor 15-inch diagonal Head-Up Display and Rear Camera Mirror.
For safety and driver assistance, the Sierra 2500HD is equipped with lane assist and parking sensors. The adaptive cruise control and front and rear heated seats make any journey, long or short, more enjoyable and stress-free. Safety is comprehensive with features like an exhaust brake, rear sliding power window, and a suite of driver assistance technologies.
Whether you're a professional looking for a reliable workhorse or an adventurer seeking a capable companion, this 2026 GMC Sierra 2500HD AT4 fits all your needs. Contact Robinson Buick GMC today to learn more and take this powerhouse for a test drive. This isn't just a truck; it's the backbone of your future endeavors.
Packages & Options
Standard Equipment
Technical Specifications
-
AM/FM Stereo
-
Auxiliary Audio Input
-
Bluetooth Connection
-
MP3 Player
-
Navigation System
-
Smart Device Integration
-
Requires Subscription
-
Satellite Radio
-
Premium Sound System
-
WiFi Hotspot
-
Aluminum Wheels
-
Tires - Front All-Terrain
-
Tires - Rear All-Terrain
-
Conventional Spare Tire
-
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
-
Bumper, front, body-colour lower
-
Bumper, rear body-colour with bumper CornerSteps
-
Bed Liner
-
Bed Step, Black integrated on forward portion of bed on driver and passenger side
-
CornerStep, rear bumper
-
Mouldings, beltline, Black
-
Grille (Gloss Black header and grille insert bars with Black Chrome accents.)
-
Daytime Running Lights
-
Automatic Highbeams
-
Fog Lamps
-
Lamps, cargo area cab mounted integrated with centre 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 centre switch bank or key fob
-
Taillamps, Animated LED Signature Tail, Stop, turn and Reverse lamps
-
Heated Mirrors
-
Integrated Turn Signal Mirrors
-
Power Folding Mirrors
-
Power Mirror(s)
-
Mirror caps, high gloss Black
-
Privacy Glass
-
Intermittent Wipers
-
Rain Sensing Wipers
-
Variable Speed Intermittent Wipers
-
Integrated Tailgate Step
-
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
-
Bucket Seats
-
Leather Seats
-
Pass-Through Rear Seat
-
Rear Bench Seat
-
Driver Adjustable Lumbar
-
Power Driver Seat
-
Passenger Adjustable Lumbar
-
Power Passenger Seat
-
Heated Front Seat(s)
-
Cooled Front Seat(s)
-
Heated Rear Seat(s)
-
Mirror Memory
-
Seat Memory
-
Floor covering, colour-keyed carpeting
-
Floor Mats
-
Steering wheel, wrapped
-
Heated Steering Wheel
-
Steering Wheel Audio Controls
-
Adjustable Steering Wheel
-
Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
-
Rear Seat Reminder
-
GMC Premium information Display- 13.4" diagonal Multicolour touch screen
-
Exterior Temperature Display, located in radio display
-
Compass, located in instrument cluster
-
Power Windows
-
Power Door Locks
-
Keyless Entry
-
Keyless Start
-
Remote Engine Start
-
Adaptive Cruise Control
-
Cruise Control
-
Wireless Charging
-
Security System
-
Auxiliary Audio Input
-
MP3 Player
-
Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) instrument panel mounted power outlet)
-
A/C
-
Climate Control
-
Multi-Zone A/C
-
Rear Defrost
-
Auto-Dimming Rearview Mirror
-
Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
-
8 Cylinder Engine
-
Gasoline Fuel
-
10-Speed A/T
-
A/T
-
Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
-
Running Boards/Side Steps
-
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.)
-
Keyless Start
-
Hill Descent Control
-
Transfer case, two-speed active, electronic Autotrac with push button control
-
Locking/Limited Slip 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.)
-
Tow Hooks
-
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
-
Power Steering
-
4-Wheel Disc Brakes
-
ABS
-
Brake lining wear indicator
-
Capless Fuel Fill (Requires (L8T) 6.6L gas V8 engine.)
-
X31 Off-Road Package includes (JHD) Hill Descent Control, (NZZ) skid plates, Off-Road suspension and Twin-tube Rancho shocks
-
Automatic Highbeams
-
Front Collision Mitigation
-
Front Collision Warning
-
Lane Departure Warning
-
Tow Hitch
-
ProGrade Trailering System includes (PZ8) Hitch Guidance with Hitch View and (UET) In-vehicle Trailering App
-
Front Collision Mitigation
-
Front Collision Warning
-
Stability Control
-
Traction Control
-
Daytime Running Lights
-
Driver Air Bag
-
Front Head Air Bag
-
Front Side Air Bag
-
Passenger Air Bag
-
Passenger Air Bag Sensor
-
Rear Head Air Bag
-
Requires Subscription
-
Telematics
-
Rear Parking Aid
-
Aerial View Display System
-
Back-Up Camera
-
Trailer Camera Provisions and trailer viewing software
-
Hitch Guidance dynamic single line to aid in truck trailer alignment for hitching
-
Lane Departure Warning
-
Rear Seat Belt Indicator
-
Cross-Traffic Alert
-
Blind Spot Monitor
-
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
-
Driver Restriction Features
-
Tire Pressure Monitor
-
Trailering Information Label provides max trailer ratings for tongue weight, conventional, gooseneck and 5th wheel trailering
No matches were found.
-
Vehicle NameGMC Sierra 2500HD
-
Body StyleCrew Cab Pickup
-
Body CodeE63
-
DrivetrainFour Wheel Drive
-
Trans Order CodeMGM
-
Trans Type10
-
Trans Description Cont.Automatic
-
First Gear Ratio (:1)4.54
-
Second Gear Ratio (:1)2.87
-
Third Gear Ratio (:1)2.06
-
Fourth Gear Ratio (:1)1.72
-
Fifth Gear Ratio (:1)1.48
-
Sixth Gear Ratio (:1)1.26
-
Seventh Gear Ratio (:1)1.00
-
Eighth Gear Ratio (:1)0.85
-
Ninth Gear Ratio (:1)0.69
-
Tenth Gear Ratio (:1)0.63
-
Reverse Ratio (:1)4.54
-
Transfer Case Gear Ratio (:1), High1
-
Passenger Capacity5
-
Front Head Room (in)43.03
-
Front Leg Room (in)44.53
-
Front Shoulder Room (in)66.02
-
Front Hip Room (in)61.18
-
Second Head Room (in)40.12
-
Second Leg Room (in)43.4
-
Second Shoulder Room (in)65.3
-
Second Hip Room (in)60.24
-
Gross Axle Wt Rating - Front (lbs)5600
-
Curb Weight - Front (lbs)4013
-
Curb Weight - Rear (lbs)2812
-
Gross Vehicle Weight Rating Cap (lbs)11350
-
Gross Combined Wt Rating (lbs)27500
-
Dead Weight Hitch - Max Trailer Wt. (lbs)5000
-
Dead Weight Hitch - Max Tongue Wt. (lbs)500
-
Wt Distributing Hitch - Max Trailer Wt. (lbs)18500
-
Wt Distributing Hitch - Max Tongue Wt. (lbs)1850
-
Fifth Wheel Hitch - Max Trailer Wt. (lbs)17300
-
Fifth Wheel Hitch - Max Tongue Wt. (lbs)4325
-
Maximum Trailering Capacity (lbs)20000
-
Engine Order CodeL5P
-
Engine TypeTurbocharged Diesel V8
-
Displacement6.6L
-
Fuel SystemDirect Injection
-
SAE Net Horsepower @ RPM470 @ 2800
-
SAE Net Torque @ RPM975 @ 1600
-
Engine Oil CoolerYes
-
Cold Cranking Amps @ 0° F (Primary)720
-
Maximum Alternator Capacity (amps)220
-
Frame TypeBox Ladder
-
Suspension Type - FrontShort/Long Arm w/Torsion Bar
-
Suspension Type - Rear2-Stage Multi-Leaf
-
Axle Ratio (:1) - Front3.42
-
Axle Ratio (:1) - Rear3.42
-
Shock Absorber Diameter - Front (mm)51
-
Shock Absorber Diameter - Rear (mm)51
-
Stabilizer Bar Diameter - Front (in)1.38
-
Front Tire Order CodeQF9
-
Rear Tire Order CodeQF9
-
Spare Tire Order CodeZYG
-
Front Tire SizeLT275/65R20
-
Rear Tire SizeLT275/65R20
-
Spare Tire SizeLT275/70R18
-
Front Wheel Size (in)20
-
Rear Wheel Size (in)20
-
Spare Wheel Size (in)18
-
Front Wheel MaterialAluminum
-
Rear Wheel MaterialAluminum
-
Steering TypePwr Recirculating Ball
-
Turning Diameter - Curb to Curb (ft)52.7
-
Brake TypePwr
-
Brake ABS System4-Wheel
-
Disc - FrontYes
-
Disc - RearYes
-
Front Brake Rotor Diam x Thickness (in)14 x 1.6
-
Rear Brake Rotor Diam x Thickness (in)14.1 x 1.3
-
Fuel Tank Capacity, Approx (L)136
-
Wheelbase (in)159
-
Length, Overall (in)250.75
-
Width, Max w/o mirrors (in)81.85
-
Height, Overall (in)79.82
-
Cab to Axle (in)42.17
-
Ground Clearance, Front (in)10.12
-
Ground Clearance, Rear (in)10.12
-
Cargo Box Length @ Floor (in)82.2
-
Cargo Box Width @ Floor (in)71.4
-
Cargo Box Width @ Wheelhousings (in)51.85
-
Cargo Box (Area) Height (in)21
-
Cargo Volume (ft³)69.5
No matches were found.
Find Us
Similar Vehicles
Crew Cab Short Box 4-Wheel Drive Denali
VIN: 1GTUUGEL2TZ241124
City: 16L/100 km • Hwy: 12.1L/100 km
Crew Cab Short Box 4-Wheel Drive Denali
VIN: 1GTUUGEL3TZ236398
City: 16L/100 km • Hwy: 12.1L/100 km
Crew Cab Short Box 4-Wheel Drive Denali
VIN: 1GTUUGEL3TZ236529
City: 16L/100 km • Hwy: 12.1L/100 km
Crew Cab Short Box 4-Wheel Drive Denali
VIN: 1GTUUGEL3TZ238619
City: 16L/100 km • Hwy: 12.1L/100 km
Crew Cab Short Box 4-Wheel Drive Denali
VIN: 1GTUUGEL5TZ240940
City: 16L/100 km • Hwy: 12.1L/100 km
5.83ft Box Length
VIN: 3GTUUGEL3TG231329
City: 16L/100 km • Hwy: 12.1L/100 km
* Every reasonable effort is made to ensure the accuracy of the information listed above. Vehicle pricing, incentives, options (including standard equipment), and technical specifications listed is for the 2026 GMC Sierra 2500HD AT4 may not match the exact vehicle displayed. Please confirm the accuracy of this information with a sales representative.
Calculate Payments
Finance
Lease