2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [0]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [1]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [2]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [3]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [4]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [5]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [6]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [7]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [8]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [9]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [10]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [11]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [12]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [13]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [14]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [15]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [16]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [17]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [18]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [19]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [20]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [21]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [22]

2026 GMC Sierra 1500 AT4 4WD Crew Cab 147″ AT4 Turbocharged Diesel I6 3.0L/183 [23]

Details

Exterior Color: Coastal Dune
Interior Color: Jet Black with Kalahari accents
Body Style: Pickup
Transmission: 10-Speed Automatic

Stock: T261266
VIN: 1GTUUEE8XTZ512446
Mileage: 7
Engine: Turbocharged Diesel I6 3.0L/183
City MPG:
Highway MPG:

Installed Options

Coastal dune $495

Total Cost: $495

Highlights

4 wheel Drive
4 wheel Drive
Anti Lock Braking System
Anti Lock Braking System
Steering Wheel Controls
Steering Wheel Controls
Power Seat(s)
Power Seat(s)
Heated Seats
Heated Seats
Remote Start
Remote Start
Cruise Control
Cruise Control
Backup Camera / Assist
Backup Camera / Assist
Blind Spot Monitor
Blind Spot Monitor
Cross-Traffic Alert
Cross-Traffic Alert
Multi-Zone A/C
Multi-Zone A/C
Keyless Entry
Keyless Entry
Navigation
Navigation
Premium Sound
Premium Sound
Satellite Radio
Satellite Radio
Rain Sensing Wipers
Rain Sensing Wipers
Bluetooth
Bluetooth
Back-Up Camera
Back-Up Camera
Keyless Start
Keyless Start
Cooled Seat(s)
Cooled Seat(s)
Power Folding Mirrors
Power Folding Mirrors
Lane Departure Warning
Lane Departure Warning
Lane Keeping Assist
Lane Keeping Assist
Wifi
Wifi
Adaptive Cruise
Adaptive Cruise
Smartphone Integration
Smartphone Integration
Android Auto
Android Auto
Apple Carplay
Apple Carplay

Overview

The new 2026 GMC Sierra 1500 AT4 combines rugged 4x4 capability with a modern 3.0L diesel engine that delivers strong torque and efficient power for serious truck work and daily driving. The AT4 trim brings premium truck engineering with a well-equipped cabin designed for comfort and confidence on any road. This Sierra 1500 AT4 stands out with practical driver assistance features including adaptive cruise control and lane departure warning that make highway driving more relaxed and secure. Heated steering wheel and automatic climate control add everyday comfort, while the navigation system and steering wheel audio controls keep you connected without distraction. Rear parking sensors and an auto-dimming rearview mirror make maneuvering and parking straightforward, even in tight situations. *Key Features* * *Powertrain:* 3.0L diesel engine with 4x4 drivetrain for capable traction and efficient torque delivery * *Driver Assistance:* Adaptive cruise control, lane departure warning, and rear parking sensors for added confidence * *Comfort & Convenience:* Heated steering wheel, automatic climate control, power seats, Rear Camera Mirror, Multicolour 15" Diagonal Head-Up Display, Bed View Camera, power sunroof, Universal Home Remote, rear sliding power window and rain sensing wipers * *Technology:* Navigation system, steering wheel audio controls, and auto-dimming rearview mirror * *Lighting:* Fog lights for improved visibility in varied conditions Contact Gauthier Cadillac Buick GMC to arrange a test drive or learn more about this new Sierra 1500 AT4.

Options

Coastal dune
AT4 PREFERRED PACKAGE includes (UG1) Universal Home Remote and (A48) rear sliding power window
3 YEARS SIRIUSXM
ASSIST HANDLE SIDE (bed mounted; fold out grab handle for extra support)
TECHNOLOGY PACKAGE includes (DRZ) Rear Camera Mirror and (UV6) Multicolour 15" Diagonal Head-Up Display (Includes (UVN) Bed View Camera.)
GVWR 7200 LBS. (3266 KG) (STD)
COASTAL DUNE
4-Wheel Disc Brakes
Power Windows
Front Collision Warning
Auxiliary Audio Input
Tow Hooks
ABS
Power Steering
Telematics
Automatic Highbeams
MP3 Capability
Lane Keeping Assist
Turbocharged
Requires Subscription
Power Folding Mirrors
Keyless Start
Tire Pressure Monitor
Variable Speed Intermittent Wipers
Front Collision Warning
Climate Control
Smart Device Integration
Stability Control
Rear Head Air Bag
Cruise Control
Rear Bench Seat
Back-Up Camera
Integrated Tailgate Step
Power Windows
Daytime Running Lights
Daytime Running Lights
Floor Mats
Power Door Locks
Premium Sound System
Floor Mats
Power Windows
Passenger Adjustable Lumbar
Front Collision Warning
Front Side Air Bag
Driver Adjustable Lumbar
Front Collision Mitigation
Auto-Dimming Rearview Mirror
Telematics
Heated Mirrors
Heated Rear Seat(s)
Blind Spot Monitor
Automatic Highbeams
Privacy Glass
AM/FM Stereo
Lane Keeping Assist
Adjustable Steering Wheel
Bed Liner
Power Door Locks
Fog Lamps
Driver Air Bag
Power Passenger Seat
Multi-Zone A/C
Requires Subscription

Jet black with kalahari accents, perforated leather front seat trim
SUNROOF POWER
TRANSMISSION 10-SPEED AUTOMATIC WITH ELECTRONIC PRECISION SHIFT ELECTRONICALLY CONTROLLED with overdrive tow/haul mode and steering column paddle shifters. Includes Cruise Grade Braking and Powertrain Grade Braking (STD)
REAR AXLE 3.23 RATIO
TIRES LT265/60R20 BLACKWALL GOODYEAR WRANGLER TERRITORY MT Includes (XCQ) spare tire.)
LPO FRONT AND REAR MOULDED SPLASH GUARDS BLACK (dealer-installed)
ENGINE DURAMAX 3.0L TURBO-DIESEL I6 (305 hp [227 kW] @ 3750 rpm 495 lb-ft of torque [671 Nm] @ 2750 rpm) (Includes (KW5) 220-amp alternator and (K05) engine block heater.) (STD)
Locking/Limited Slip Differential
Front Collision Mitigation
Four Wheel Drive
Conventional Spare Tire
Bluetooth Connection
Requires Subscription
Satellite Radio
Tires - Rear All-Terrain
Keyless Start
Tires - Front All-Terrain
Tow Hitch
Aluminum Wheels
Lane Departure Warning
Front Head Air Bag
Aerial View Display System
Intermittent Wipers
Navigation System
Adaptive Cruise Control
Keyless Entry
Heated Steering Wheel
Power Driver Seat
Mirror Memory
Leather Seats
Cooled Front Seat(s)
Front Collision Warning
Bluetooth Connection
Auxiliary Audio Input
Traction Control
Rear Parking Aid
Mirror Memory
Heated Front Seat(s)
Heated Front Seat(s)
Power Mirror(s)
Lane Departure Warning
Steering Wheel Audio Controls
MP3 Capability
Seat Memory
Security System
Driver Monitoring
Bluetooth Connection
Cross-Traffic Alert
Pass-Through Rear Seat
Satellite Radio
Smart Device Integration
Rear Defrost
Bucket Seats
WiFi Hotspot
Front Collision Mitigation
Remote Engine Start
Passenger Air Bag Sensor
Rain Sensing Wipers
Requires Subscription
Auxiliary Audio Input
Passenger Air Bag
MP3 Capability
LED Headlights

Interior

Adaptive Cruise Control
Air vents, rear
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
Bose Sound System, premium 7-speaker system with Richbass woofer
Centre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
Defogger, rear-window electric
Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
Exterior Temperature Display, located in radio display
GMC Premium information Display-13.4" diagonal Multicolour I touch screen
Keyless Open and Start includes remote keyless entry
Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) interior power outlet)
Premium Floor Liners with removable carpet insert, front
Remote vehicle starter system
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, centre fold out armrest with 2 cupholders, full cab width under-seat storage, (includes child seat top tether anchor)
Seats, front bucket with centre console
Seats, ventilated driver and front passenger
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, power rake and telescoping
Steering wheel, heated
Theft-deterrent system, unauthorized entry
USB Ports, 2 (first row) located on console
Wi-Fi Hotspot capable (Terms and limitations apply. See onstar.ca or dealer for details.)
Windows, power front, drivers express up/down
Wireless Charging

Air conditioning, dual-zone automatic climate control
Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
Bluetooth for phone connectivity to vehicle infotainment system
Brake lining wear indicator
Compass, located in instrument cluster
Door locks, power
Driver memory recalls driver "presets" for power driver seat and outside mirrors
Floor covering, colour-keyed carpeting
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
Mirror, inside rearview auto-dimming
Power outlet, interior power outlet, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
Premium Floor Liners with removable carpet insert, rear
Seat adjuster, driver 10-way power including lumbar
Seat trim, Perforated leather front
Seating, heated driver and front outboard passenger
Seats, heated second row outboard seats
SiriusXM
Steering column lock, electrical
Steering wheel audio controls
Steering wheel, wrapped
USB ports, (2) charge-only, rear
USB Ports, 2, Charge/Data ports located inside centre console
Window, power front, passenger express up/down
Windows, power rear, express down
Wireless, Apple CarPlay / Wireless Android Auto

Mechanical

Air filter, heavy-duty
Auto-locking rear differential
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.)
Capless Fuel Fill
Electronic Precision Shift and steering column paddle shifters
Exhaust, dual system (Includes chrome exhaust tips. Not available with (L87) 6.2L EcoTec3 V8 engine.)
Frame, fully-boxed, hydroformed front section
Hill Descent Control
Push Button Start
Recovery hooks, Red
Steering, Electric Power Steering (EPS) assist, rack-and-pinion
Trailer brake controller, integrated

Alternator, 220 amps
Automatic Stop/Start
Brakes, 4-wheel antilock, 4-wheel disc with DURALIFE rotors
Cargo tie downs (12), fixed, rated at 500 lbs per corner
Exhaust, aluminized stainless-steel muffler and tailpipe
Four wheel drive
GVWR, 7200 lbs. (3266 kg) (Requires TK10*43 Crew Cab 4WD model with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
Pickup bed
Rear axle, 3.23 ratio
Skid Plates
Suspension, Off-Road with 2" factory installed lift and monotube shocks
Transfer case, two-speed, electronic Autotrac with push button control (4WD models only)

Safety

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
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.)
Following Distance Indicator (Included and only available with (PDI) GMC Pro Safety.)
Front and Rear Park Assist, ultrasonic
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 View with image adjustment, Pan/Zoom/Tilt
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.)
Rear Cross Traffic Braking
Rear Seat Belt Indicator
Safety Alert Seat (Included and only available with (PDI) GMC Pro Safety.)
StabiliTrak, stability control system with Proactive Roll Avoidance and traction control, includes electronic trailer sway control and hill start assist
Trailer Camera Provisions and trailer viewing software

Automatic Emergency Braking (Included and only available with (PDI) GMC Pro Safety.)
Daytime Running Lamps, LED signature lighting
Forward Collision Alert (Included and only available with (PDI) GMC Pro Safety.)
Front Pedestrian Braking (Included and only available with (PDI) GMC Pro Safety.)
Hitch Guidance
Lane Keep Assist with Lane Departure Warning (Included and only available with (PDI) GMC Pro Safety.)
OnStar services capable (See onstar.ca for details and limitations. Services vary by model. Service plan required.)
Rear Pedestrian Alert
Rear Seat Reminder
Seat Belt Adjustable Guide Loops, front row only
Tire Pressure Monitoring System, auto learn includes Tire Fill Alert (does not apply to spare tire)
Trailer Side Blind Zone Alert

Exterior

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.)
Bumper, rear body-colour with corner steps
Door handles, body-colour
Glass, deep-tinted
Headlamps, LED projectors with Fade-on/Fade-off animation, LED turn signals and Daytime Running Lamps
Lamps, cargo area, cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
Lighting, perimeter
Mirrors, outside heated power-adjustable, power-folding and driver-side auto-dimming puddle lamps, side perimeter lighting and memory
Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
Taillamps, LED LED signature taillight with LED stop, turn & reverse and Fade-on/Fade-off animation
Tire, spare 255/80R17SL all-season, blackwall (Included and only available with 20" or 22" wheels and tires excluding (QFV) LT265/60R20 MT blackwall Goodyear Wrangler Territory tires.)
Wheel, 17" x 8" (43.2 cm x 20.3 cm) full-size, steel spare
Wheels, 20" x 9" (50.8 cm x 22.9 cm) machined aluminum with Carbon Grey Metallic accents

Bumper, front, body-colour lower
CornerStep, rear bumper
Fog lamps, LED
Grille (Black chrome header and grille insert bars with gloss black accents.)
IntelliBeam, automatic high beam on/off (Included and only available with (PDI) GMC Pro Safety.)
LED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fob
Mirror caps, high gloss Black
Tailgate and bed rail protection caps, top
Tailgate, GMC MultiPro Tailgate with six functional load/access features
Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
Tires, 275/60R20SL all-terrain, blackwall (Includes (QAQ) spare tire.)
Wheelhouse liners, rear (Deleted with (PCP) AT4 CarbonPro Edition.)
Wipers, front rain-sensing

Package

Trailering Package includes trailer hitch, 7-pin and 4-pin connectors and (CTT) Hitch Guidance

Disclaimer

Pricing shown does not include taxes, including sales taxes or luxury taxes (where applicable). Prices represent the selling price minus current incentives and include air conditioning charge, freight, tire levy (where applicable), dealer-installed options, accessories, pre-delivery, administration charges and other retailer charges and exclude taxes, license and insurance. All prices are in Canadian Dollars unless otherwise stated and all financing is OAC. Please contact the dealership for more information.

Every effort is made to ensure the accuracy of the content. In the event of a discrepancy, error and/or omission or vehicle prices, please contact the dealership to confirm all information and pricing.

In the event of a discrepancy, error and/or omission or vehicle prices, please contact the dealership to confirm all information and pricing.

Effective September 1st, 2022, vehicles sold in Canada above $100,000 pre-tax retail price may be subject to a luxury tax of either 20% on the amount above $100,000 or a flat 10% on the full value. This tax is in addition to the Provincial Sales Tax (PST) and the Goods and Services Tax (GST). For official information, refer to the Government of Canada website.