Vehicle Details
Body Style
Truck
Engine
3.0L 6Cyl
Exterior Colour
Black
Interior Colour
Brown
Transmission
Automatic
Drivetrain
4×4
Stock
18-260314
Fuel Type
Diesel
Trim Details
Crew Cab Short Box 4-Wheel Drive Denali Ultimate
Description
2026 GMC Sierra Denali Ultimate Crew Cab Duramax Diesel – Onyx Black
Luxury meets legendary diesel performance in the 2026 GMC Sierra Denali Ultimate Crew Cab, the most refined and technologically advanced Sierra ever built. Finished in Onyx Black and equipped with 22" Ultra-Bright Machined wheels with chrome accents, this flagship GMC truck delivers unmistakable presence, premium craftsmanship, and serious capability.
The Denali Ultimate represents the very top of the Sierra lineup, combining heavy-duty performance with luxury SUV-level comfort.
Duramax 3.0L Turbo-Diesel Power
Under the hood is the efficient and powerful Duramax 3.0L Turbo-Diesel I6, producing 305 horsepower and an impressive 495 lb-ft of torque. Paired with a 10-speed automatic transmission, this advanced diesel powertrain delivers smooth acceleration, excellent towing capability, and impressive highway efficiency.
With the 3.23 rear axle ratio, tow/haul mode, and advanced powertrain braking systems, the Sierra Denali Ultimate is designed to confidently handle trailers, boats, and equipment across Ontario.
The engine also includes:
• Engine block heater for Canadian winters • 220-amp alternator • Advanced cooling and towing systems
Denali Ultimate Luxury Interior
Inside the cabin, the Alpine Umber Full-Grain Leather interior sets this truck apart. Denali Ultimate models feature exclusive materials and craftsmanship rarely found in pickup trucks.
Highlights include:
• Full-grain leather seating surfaces • Unique Denali Ultimate interior design and stitching • Premium wood and metal trim • Heated and ventilated front seating • Spacious Crew Cab configuration
This is luxury designed for both work and everyday comfort.
Advanced Technology
The Sierra Denali Ultimate is packed with cutting-edge technology designed to enhance both convenience and safety.
The centrepiece is the 13.4" GMC Premium Infotainment System with Google Built-In, offering:
• Integrated Google Maps navigation • Voice assistance and connected apps • Wireless Apple CarPlay and Android Auto • Bluetooth streaming audio • Large multi-touch display with customizable profiles
This intuitive system keeps drivers connected while maintaining focus on the road.
🚛 Premium Exterior Design
The Denali Ultimate exterior combines bold GMC styling with premium finishing details.
Key highlights include:
• 22" Ultra-Bright Machined wheels with chrome accents • Dual chrome exhaust outlets • Body-colour wheel arch mouldings • Signature Denali Ultimate design elements • Power running boards and premium exterior lighting
The result is a truck that looks just as impressive arriving at a job site as it does pulling into a restaurant downtown.
Why Buy Your GMC Sierra at Boyer Chevrolet Buick GMC Ajax?
Located at 425 Bayly Street West in Ajax, Boyer Chevrolet Buick GMC Ajax proudly maintains a 4.7-star Google rating with over 1,700 reviews. Our team is committed to delivering a professional, transparent, and enjoyable buying experience.
When you purchase from Boyer Ajax, you receive:
• Competitive lease and finance options • A trusted GMC dealership serving Ajax, Whitby, Oshawa, and Durham Region • Factory-trained technicians and full service support • A dealership focused on long-term customer relationships
Book Your Test Drive Today
If you're considering a Ford F-150 Platinum, Ram Limited, or other luxury pickup trucks, the 2026 GMC Sierra Denali Ultimate offers unmatched diesel efficiency, technology, and craftsmanship.
📞 Call 905-427-2500 📍 Visit Boyer Chevrolet Buick GMC Ajax 📅 Book your test drive today
Duramax diesel efficiency. Denali Ultimate luxury. GMC capability.
Experience the best Sierra ever built.
Packages & Options
Standard Equipment
Technical Specifications
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AM/FM Stereo
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Auxiliary Audio Input
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Bluetooth Connection
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MP3 Player
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Navigation System
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Smart Device Integration
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Requires Subscription
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Satellite Radio
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Premium Sound System
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Steering Wheel Audio Controls
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WiFi Hotspot
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Aluminum Wheels
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Wheel Locks
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Tires - Front Performance
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Tires - Rear Performance
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Tires - Front All-Season
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Tires - Rear All-Season
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Wheel, 17" x 8" (43.2 cm x 20.3 cm) full-size, steel spare
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Wheelhouse liners, rear (Deleted with (E3Z) Carbon Fibre Composite Bed.)
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Tire carrier lock keyed cylinder lock that utilizes same key as ignition and door
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Generic Sun/Moonroof
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Sun/Moonroof
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Bumper, front, body-colour lower
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Bumper, rear body-colour with corner steps
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CornerStep, rear bumper
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Power Retractable Running Boards
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Running Boards/Side Steps
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Mouldings, window surround, Chrome
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Grille (Vader chrome header with Signature Denali Grille in vader chrome.)
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Daytime Running Lights
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LED Headlights
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Automatic Highbeams
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Fog Lamps
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Lighting, perimeter
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Taillamps, LED LED signature taillight with LED stop, turn & reverse and Fade-on/Fade-off animation
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Heated Mirrors
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Mirror Memory
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Power Folding Mirrors
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Power Mirror(s)
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Mirror caps, chrome
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Intermittent Wipers
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Rain Sensing Wipers
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Variable Speed Intermittent Wipers
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Rear Defrost
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Sliding Rear Window
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Privacy Glass
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Lamps, cargo area, cab mounted integrated with centre high mount stop lamp, with switch in bank on left side of steering wheel
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LED Cargo Area Lighting located in cargo bed activated with switch on centre switch bank or key fob
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GMC Front and Rear Logo, Vader Chrome
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Integrated Tailgate Step
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Tailgate, gate function manual with EZ Lift includes power lock and release, includes hitch area light
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Tailgate and bed rail protection caps, top
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Door handles, chrome
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Bed Liner
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Premium Sound System
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Bucket Seats
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Leather Seats
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Driver Adjustable Lumbar
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Power Driver Seat
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Seat-Massage
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Passenger Adjustable Lumbar
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Power Passenger Seat
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Heated Front Seat(s)
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Mirror Memory
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Seat Memory
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Cooled Front Seat(s)
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Pass-Through Rear Seat
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Rear Bench Seat
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Heated Rear Seat(s)
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Centre Console, floor-mounted with cup holders, cell phone storage, power cord management, hanging file folder capability
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Floor covering, colour-keyed carpeting
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Floor Mats
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Adjustable Steering Wheel
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Leather Steering Wheel
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Heated Steering Wheel
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Driver Information Centre, enhanced, 12.3" diagonal reconfigurable multicolour digital display
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GMC Premium information Display-13.4" diagonal Multicolour I touch screen
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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
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Compass, located in instrument cluster
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Exterior Temperature Display, located in radio display
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Heads-Up Display
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Brake lining wear indicator
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Power Windows
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Power Door Locks
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Keyless Entry
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Keyless Start
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Remote Engine Start
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Universal Garage Door Opener
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Adaptive Cruise Control
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Cruise Control
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Cruise Control Steering Assist
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Driver Monitoring
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Lane Departure Warning
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Lane Keeping Assist
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Requires Subscription
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Telematics
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Security System
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Steering column lock, electrical
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Wireless Charging
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Power outlet, interior power outlet, 120-volt (400 watts shared with (KC9) bed mounted power outlet)
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Power outlet, bed mounted, 120-volt (400 watts shared with (KI4) interior power outlet)
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Auxiliary Audio Input
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MP3 Player
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USB ports, (2) charge-only, rear
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A/C
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Climate Control
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Multi-Zone A/C
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Air vents, rear
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Rear Defrost
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Auto-Dimming Rearview Mirror
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Back-Up Camera
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Assist handles front A-pillar mounted for driver and passenger, rear B-pillar mounted
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8 Cylinder Engine
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Gasoline Fuel
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10-Speed A/T
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A/T
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Transmission w/Dual Shift Mode
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Rear axle, 3.23 ratio
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Pickup bed
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GVWR, 7100 lbs. (3221 kg) (Requires (L87) 6.2L EcoTec3 V8 engine.)
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Keyless Start
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Air filter, heavy-duty
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Automatic Stop/Start
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Hill Descent Control (Requires 4WD model.)
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Locking/Limited Slip Differential
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Transfer case, two-speed, electronic Autotrac with push button control (4WD models only)
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Denali Premium Suspension with Adaptive Ride Control
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Four Wheel Drive
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Cooling, external engine oil cooler (Not available with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
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Cooling, auxiliary external transmission oil cooler (Not available with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
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Alternator, 170 amps (Included and only available with (L87) 6.2L EcoTec3 V8 engine. Not available with (LZ0) Duramax 3.0L Turbo-Diesel I6 engine.)
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Battery, heavy-duty 730 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power (Included and only available with (L87) 6.2L EcoTec3 V8 engine.)
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Frame, fully-boxed, hydroformed front section
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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
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Trailer brake controller, integrated
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Tow Hooks
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Cargo tie downs (12), fixed, rated at 500 lbs per corner
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Power Steering
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4-Wheel Disc Brakes
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ABS
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Capless Fuel Fill
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Active Exhaust, Dual, sport-mode enabled (Required and only available with (L87) 6.2L EcoTec3 V8 engine. Not available with (N10) Dual exhaust.)
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Exhaust, aluminized stainless-steel muffler and tailpipe
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Tow Hitch
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Automatic Highbeams
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Front Collision Mitigation
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Front Collision Warning
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Lane Departure Warning
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Lane Keeping Assist
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Brake Assist
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Front Collision Mitigation
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Front Collision Warning
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Stability Control
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Traction Control
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Daytime Running Lights
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Driver Air Bag
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Front Head Air Bag
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Front Side Air Bag
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Passenger Air Bag
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Passenger Air Bag Sensor
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Rear Head Air Bag
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Requires Subscription
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Telematics
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WiFi Hotspot
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Hitch View with image adjustment, Pan/Zoom/Tilt
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Hitch Guidance
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Aerial View Display System
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Back-Up Camera
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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 (Includes Trailer View Camera Provisions and Trailer Assist Guidelines.)
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Trailer Camera Provisions and trailer viewing software
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Rear Parking Aid
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Following Distance Indicator (Included and only available with (PDI) GMC Pro Safety.)
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Blind Spot Monitor
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Cross-Traffic Alert
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Rear Pedestrian Alert
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Driver Monitoring
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Seat Belt Adjustable Guide Loops, front row only
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Rear Seat Belt Indicator
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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.)
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Tire Pressure Monitor
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Rear Seat Reminder
No matches were found.
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Vehicle NameGMC Sierra 1500
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Body StyleCrew Cab Pickup
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Body CodeE63
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DrivetrainFour Wheel Drive
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Trans Order CodeMQC
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Trans Type10
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Trans Description Cont.Automatic
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First Gear Ratio (:1)4.70
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Second Gear Ratio (:1)2.99
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Third Gear Ratio (:1)2.15
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Fourth Gear Ratio (:1)1.77
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Fifth Gear Ratio (:1)1.52
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Sixth Gear Ratio (:1)1.28
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Seventh Gear Ratio (:1)1.00
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Eighth Gear Ratio (:1)0.85
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Ninth Gear Ratio (:1)0.69
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Tenth Gear Ratio (:1)0.64
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Reverse Ratio (:1)4.87
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Transfer Case ModelMagna MP3023/4
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Transfer Case Gear Ratio (:1), High1.00
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Transfer Case Gear Ratio (:1), Low2.69
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Passenger Capacity5
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Front Head Room (in)43.03
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Front Leg Room (in)44.53
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Front Shoulder Room (in)66.02
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Front Hip Room (in)61.18
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Second Head Room (in)40.12
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Second Leg Room (in)43.4
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Second Shoulder Room (in)65.16
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Second Hip Room (in)60.24
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Gross Axle Wt Rating - Front (lbs)3800
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Gross Axle Wt Rating - Rear (lbs)3800
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Curb Weight - Front (lbs)2845
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Curb Weight - Rear (lbs)1981
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Gross Vehicle Weight Rating Cap (lbs)7200
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Gross Combined Wt Rating (lbs)15000
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EnerGuide Estimate - City (L/100 km)10.7
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EnerGuide Estimate - Hwy (L/100 km)9.3
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G/km Of CO2 Emissions270
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Dead Weight Hitch - Max Trailer Wt. (lbs)5000
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Dead Weight Hitch - Max Tongue Wt. (lbs)500
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Wt Distributing Hitch - Max Trailer Wt. (lbs)8700
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Wt Distributing Hitch - Max Tongue Wt. (lbs)870
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Fifth Wheel Hitch - Max Trailer Wt. (lbs)6700
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Fifth Wheel Hitch - Max Tongue Wt. (lbs)1675
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Maximum Trailering Capacity (lbs)8900
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Engine TypeTurbocharged Diesel I6
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Fuel SystemDirect Injection
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Engine Order CodeLZ0
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Displacement3.0L/183
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SAE Net Horsepower @ RPM305 @ 3750
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SAE Net Torque @ RPM495 @ 2750
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Engine Oil CoolerYes
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Cold Cranking Amps @ 0° F (Primary)850
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Maximum Alternator Capacity (amps)220
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Frame TypeHydroformed
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Suspension Type - FrontIndependent
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Suspension Type - RearSolid Axle
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Spring Capacity - Front (lbs)3800
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Spring Capacity - Rear (lbs)3850
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Axle Capacity - Front (lbs)3800
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Axle Capacity - Rear (lbs)3800
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Axle Ratio (:1) - Front3.23
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Axle Ratio (:1) - Rear3.23
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Stabilizer Bar Diameter - Front (in)1.3
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Front Tire Order CodeXCE
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Rear Tire Order CodeXCE
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Spare Tire Order CodeQAQ
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Front Tire Size275/50R22SL
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Rear Tire Size275/50R22SL
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Spare Tire Size255/80R17SL
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Front Tire Capacity (lbs)3800
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Rear Tire Capacity (lbs)3800
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Revolutions/Mile @ 45 mph - Front (Rev/Mile)N/A
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Revolutions/Mile @ 45 mph - Rear (Rev/Mile)N/A
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Revolutions/Mile @ 45 mph - Spare (Rev/Mile)N/A
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Front Wheel Size (in)22 x 9
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Rear Wheel Size (in)22 x 9
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Spare Wheel Size (in)17 x 8
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Front Wheel MaterialAluminum
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Rear Wheel MaterialAluminum
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Spare Wheel MaterialSteel
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Steering TypeElectric Rack & Pinion
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Turning Diameter - Curb to Curb (ft)46.9
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Turning Diameter - Wall to Wall (ft)N/A
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Brake TypePwr
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Brake ABS System4-Wheel
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Disc - FrontYes
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Disc - RearYes
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Front Brake Rotor Diam x Thickness (in)13 x 1.18
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Rear Brake Rotor Diam x Thickness (in)13.6 x 0.79
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Fuel Tank Capacity, Approx (L)91
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Wheelbase (in)147
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Length, Overall (in)231.92
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Width, Max w/o mirrors (in)81.24
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Height, Overall (in)75.51
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Ground Clearance, Front (in)8.08
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Ground Clearance, Rear (in)8.08
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Cargo Box Length @ Floor (in)69.92
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Cargo Box Width @ Floor (in)71.4
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Cargo Box Width @ Wheelhousings (in)50.63
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Cargo Box (Area) Height (in)22.4
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Cargo Volume (ft³)62.9
No matches were found.
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* Plus HST & Licensing. Price includes: Dealer Admin Fee ($599), Etching ($299), Tire Protection ($199), Tire Duty ($22.50), and OMVIC fee ($22.00) 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 1500 Denali Ultimate may not match the exact vehicle displayed. Please confirm the accuracy of this information with a sales representative.
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