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The 2026 GMC Sierra 2500HD AT4 is a heavy-duty pickup built for drivers who need exceptional capability, premium comfort, and serious off-road performance. Powered by a Duramax 6.6L Turbo-Diesel V8 paired with the Allison 10-speed automatic transmission, the AT4 delivers impressive towing, hauling, and confidence on demanding terrain. Its factory-installed off-road suspension, Rancho monotube shocks, skid plates, hill descent control, and standard four-wheel drive make it ready for challenging trails and tough job sites alike. Inside, the Sierra 2500HD AT4 offers a refined cabin with premium materials, a large GMC infotainment touchscreen featuring wireless Apple CarPlay and Android Auto, and advanced driver-assistance technologies for added confidence behind the wheel. When youre ready to really put it to work, a gooseneck/5th wheel prep package, as well as a Universal Vehicle Module come installed and ready to go. Combining rugged capability, advanced technology, and bold AT4 styling, the 2026 GMC Sierra 2500HD AT4 is an ideal choice for work, adventure, and everything in between.

2026 GMC Sierra 2500

7 KM

Details Description Features

$121,436

+ taxes & licensing
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2026 GMC Sierra 2500

HD AT4

Watch This Vehicle
14501320

2026 GMC Sierra 2500

HD AT4

Location

Gauthier Cadillac GMC Buick

2400 McPhillips St, Winnipeg, MB R2V 4J6

877-884-1415

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$121,436

+ taxes & licensing

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New
7KM
VIN 1GT1UPEY4TF333786

Vehicle Details

  • Exterior Colour Black
  • Interior Colour Black
  • Body Style Pickup Truck
  • Fuel Type Diesel
  • Drive Type 4-Wheel Drive
  • Transmission Automatic
  • Stock # T261003
  • Mileage 7 KM

Vehicle Description

The 2026 GMC Sierra 2500HD AT4 is a heavy-duty pickup built for drivers who need exceptional capability, premium comfort, and serious off-road performance. Powered by a Duramax 6.6L Turbo-Diesel V8 paired with the Allison 10-speed automatic transmission, the AT4 delivers impressive towing, hauling, and confidence on demanding terrain. Its factory-installed off-road suspension, Rancho monotube shocks, skid plates, hill descent control, and standard four-wheel drive make it ready for challenging trails and tough job sites alike. Inside, the Sierra 2500HD AT4 offers a refined cabin with premium materials, a large GMC infotainment touchscreen featuring wireless Apple CarPlay and Android Auto, and advanced driver-assistance technologies for added confidence behind the wheel. When you're ready to really put it to work, a gooseneck/5th wheel prep package, as well as a Universal Vehicle Module come installed and ready to go. Combining rugged capability, advanced technology, and bold AT4 styling, the 2026 GMC Sierra 2500HD AT4 is an ideal choice for work, adventure, and everything in between.

Vehicle Features

Safety

Driver Air Bag
Passenger Air Bag
Traction Control
Daytime Running Lights
Stability Control
ABS
Back-Up Camera
Tire Pressure Monitor
Passenger Air Bag On/Off Switch
Rear Head Air Bag
Rear Parking Aid
Lane Departure Warning
Front Side Air Bag
Front Head Air Bag
Passenger Air Bag Sensor
Blind Spot Monitor
Cross-Traffic Alert

Interior

Security System
Cruise Control
Keyless Entry
Bucket Seats
Power Door Locks
AM/FM Stereo
Adaptive Cruise Control
Heated Steering Wheel
Steering Wheel Audio Controls
Remote Engine Start
Floor mats
Rear Bench Seat
Auto-Dimming Rearview Mirror
Keyless Start
WiFi Hotspot
Smart Device Integration

Exterior

Heated Mirrors
Aluminum Wheels
Tow Hooks
Rain Sensing Wipers
Privacy Glass
Fog Lamps
Tires - Rear All-Terrain
Tires - Front All-Terrain
Running Boards/Side Steps
Integrated Tailgate Step

Power Options

Power Windows
Power Passenger Seat
Power Mirror(s)

Mechanical

Power Steering
4-Wheel Disc Brakes
Four Wheel Drive

Seating

Leather Seats
Seat Memory
Pass-Through Rear Seat
Power Driver Seat
Driver Adjustable Lumbar
Passenger Adjustable Lumbar
Heated Front Seat(s)
Cooled Front Seat(s)

Media / Nav / Comm

Premium Sound System
Navigation System
Satellite Radio
Auxiliary Audio Input

Convenience

Intermittent Wipers
Tow Hitch
Variable Speed Intermittent Wipers
Mirror Memory

Windows

Rear Defrost

Comfort

Climate Control
A/C
Adjustable Steering Wheel
Multi-Zone A/C

Powertrain

Locking/Limited Slip Differential

Additional Features

Bed Liner
Integrated Turn Signal Mirrors
Telematics
Power Folding Mirrors
MP3 Capability
High Idle Switch
Automatic Highbeams
Heated Rear Seat(s)
Conventional Spare Tire
Bluetooth Connection
Driver Restriction Features
REAR AXLE 3.42 RATIO
Requires Subscription
LPO FRONT AND REAR MOULDED SPLASH GUARDS BLACK (dealer-installed)
GOOSENECK / 5TH WHEEL PREP PACKAGE -- HITCH PLATFORM TO ACCEPT GOOSENECK OR 5TH WHEEL HITCH. Includes hitch platform with tray to accept ball stamped bed holes with removable caps installed and bed mounted 7-pin trailer harness (similar to UY2 harness).
TRANSMISSION 10-SPEED AUTOMATIC
Front collision mitigation
Aerial View Display System
Front Collision Warning
ENGINE DURAMAX 6.6L TURBO-DIESEL V8 B20-DIESEL COMPATIBLE (470 hp [350.5 kW] @ 2800 rpm 975 lb-ft of torque [1322 Nm] @ 1600 rpm) (Includes (K05) engine block heater.)
AT4 PREMIUM PLUS PACKAGE includes (PDO) AT4 Preferred Package (CF5) power sunroof (CWM) Technology Package and (VXW) AT4 high clearance step LPO
TIRES LT275/65R20 E 126/123 BF GOODRICH OFF-ROAD T/A KO3
UNIVERSAL VEHICLE MODULE Includes module customer interface harness and instructions. Provides vehicle data over an open CAN network (J1939). 10 switchable inputs/outputs and Custom Configuration Tool to integrate upfit equipment controls. Software f...
LOWERED GVWR 9900 LBS. (4490 KG) LOWERS GVWR AND SIGNIFICANTLY DECREASES TOWING AND/OR PAYLOAD RATINGS
3 YEARS SIRIUS XM
LPO BLACK BADGING PACKAGE (dealer-installed) includes (SFZ) Black GMC emblems LPO and (RIK) Black Sierra Nameplates LPO.
ASSIST HANDLE SIDE (bed mounted
fold out grab handle for extra support)

Please contact the seller to confirm pricing, features, odometer, and availability of this vehicle.

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Gauthier Cadillac GMC Buick

2400 McPhillips St, Winnipeg, MB R2V 4J6

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877-884-XXXX

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877-884-1415

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$121,436

+ taxes & licensing>

Gauthier Cadillac GMC Buick

877-884-1415

2026 GMC Sierra 2500