NEW 2015


  • 2015 GMC Sierra 2500 Denali HD heavy duty pickup truck in Onyx Black

    Onyx Black

  • 2015 GMC Sierra 2500 Denali HD heavy duty pickup truck in Summit White

    Summit White

  • 2015 GMC Sierra 2500 Denali HD heavy duty pickup truck in Sonoma Red Metallic

    Sonoma Red Metallic

  • 2015 GMC Sierra 2500 Denali HD heavy duty pickup truck in Quicksilver Metallic

    Quicksilver Metallic

  • 2015 GMC Sierra 2500 Denali HD heavy duty pickup truck in Iridium Metallic

    Iridium Metallic


Professional Grade means professional maintenance. That's why we offer a complimentary 2-Year/40,000 KM Scheduled Lube-Oil-Filter Maintenance.


Take one look inside the new 2015 GMC Sierra 2500 Denali HD and you’ll see clearly why this is the new standard in truck interiors. Sierra’s interior brings comfort, refinement and convenience to a whole new level.

  • GMC Sierra 2500 Denali HD heavy duty truck luxurious interior seating.
  • Spacious seating offered by the GMC Sierra 2500 Denali HD pickup truck.
  • The 2015 Sierra 2500 Denali HD heavy duty truck steering wheel and driver controls.
The spacious interior of the 2015 GMC Sierra 2500 Denali HD heavy duty truck.


Detailed craftsmanship, driver-centric design and quality appointments make the new 2015 Sierra 2500 Denali HD a cut above other trucks with available:

  • Durable, soft-touch instrument panel materials and door trim
  • Burnished aluminum trim on instrument panel, steering wheel and centre console
  • Contrasting stitching
  • Denali-exclusive perforated leather-appointed seating with unique Denali identification
2015 GMC Sierra power front seating enables easier seating adjustments.


GMC Sierra 2500 Denali HD’s cabin is engineered to provide you and your passengers with a noticeably quiet interior. Features contributing to cabin quietness include:

  • New inlaid door designs that help reduce wind noise
  • Triple door seals that help block outside noise
  • Hydraulic powertrain and body mounts that minimize vibration and road input
GMC Sierra 2500 Denali HD pickup truck convenient interior storage compartments.


From the exceptional storage space in the centre console to connectivity and convenience features, Sierra 2500 Denali HD is designed to give you the comfort you deserve and the flexible functionality you need. Features include:

  • A centre console big enough to store hanging file folders, laptops and much more
  • Dual-density seat foam that holds its shape longer and helps keep you comfortable
  • Larger controls that are easy to reach and read
  • USB1 ports and 12V charging outlets
  • 110V power outlet
  • Improved rear-seat leg room on Crew Cab models
  • Heated and cooled front seats
  • Heated steering wheel


From innovative cargo box features to striking new styling featuring details that make it truly stand apart, the 2015 Sierra 2500 Denali HD earns its respect by example.

  • 2015 Sierra 2500 Denali HD heavy duty truck exterior design front grille view.
  • 2015 Sierra 2500 Denali HD rear exterior design view.
  • Sierra 2500 Denali HD heavy duty pickup truck has an available EZ-Lift and Lower Tailgate.
  • GMC Sierra 2500 Denali HD heavy duty pickup truck rear bumper step.
  • 2015 Sierra 2500 Denali HD heavy duty truck has Cargo Box innovations like the available under-rail box lights.
GMC Sierra 2500HD pickup truck available under-rail box lights.


The 2015 GMC Sierra 2500 Denali HD shows how our Never Say Never approach to engineering can change working harder into working smarter, with innovative, intuitive features including:

  • Integrated rear bumper corner steps for easy access to the box
  • Four upper tie-downs with 9 locations to help you manage cargo of many shapes and sizes
  • LED box lighting to help you see inside when a tonneau cover is installed
  • EZ-Lift and Lower Tailgate
GMC Sierra 2500 Denali HD with available EZ-Lift Lower Tailgate.


Protect your truck bed from scratches and dents with our durable spray-on bedliner.

  • Textured, non-skid surface
  • Covers bed surfaces below the box rails
2015 GMC Sierra 2500 Denali HD exterior design view.


It’s the little things that set the new Sierra 2500 Denali HD, taking Denali style to an unparalleled level of refinement. It features design details such as:

  • Projector headlamps
  • LED signature front lighting
  • Signature Denali grille
  • Available 20-inch forged polished aluminum wheels
  • Wheel arch mouldings
  • Rear wheelhouse liners
  • Chrome belt moulding
  • Chrome mirror caps and door handles
  • Unique Denali embossed headrests


The new 2015 Sierra 2500 Denali HD sets a high standard with technology designed to help you stay connected and in control.

2015 GMC Sierra 2500 Denali HD with Colour Touch Radio with IntelliLink and hands-free control.


Standard on the Sierra 2500 Denali HD, the 203 mm (8”) diagonal Colour Touch Radio with navigation3 and IntelliLink®2 lets you customize your media and connect to your world. Features include Natural Language voice command, hands-free calling and Bluetooth® connectivity.1


The 2015 Sierra 2500 Denali HD puts absolute control at your fingertips. The standard reconfigurable 203 mm (8") diagonal display in the instrument cluster provides an intuitive way to customize your vehicle information and media displays.


The 2015 Sierra 2500 Denali HD lets you set your information your way, and deliver the data you need at a glance. Choose from a menu of display options to customize what you see and how you see it.


We built the GMC Sierra 2500 Denali HD to deliver everything you expect from a heavy-duty truck – and then we exceeded those expectations with the most powerful Sierra HD ever.

2015 Sierra 2500 Denali HD truck front grille view.


The available Duramax Diesel in the Sierra 2500 Denali HD delivers 397 hp and 765 lb.-ft. of torque, making it the most powerful Sierra HD ever. The Duramax Diesel engine has a strong reputation and a proven track record with over 1 million sold since 2000.4


The enhanced Allison 1000 is designed to handle the higher torque capability of the available Duramax 6.6L Turbo Diesel engine, while also helping improve fuel-efficiency and provide seamless assistance with the exhaust brake system.


For fast starts in cold weather, quiet operation and maximum efficiency, the direct injection system helps Sierra HD, with the available Duramax 6.6L V8 Turbo Diesel engine, start in as little as 3 seconds at -40ºC and operate at nearly 206,843 kPa (30,000 psi) – turning heavy diesel fuel into a fine mist, helping deliver low emissions and more power.


Sierra 2500 Denali HD delivers a smooth ride with a fully independent torsion bar front suspension and 76.2 mm (3”) wide multi-stage rear leaf springs, which engage progressively as the load in the bed or on the hitch increases.


From strong, steady power to bold acceleration on the highway, the Vortec 6.0L V8 with Variable Valve Timing (VVT) is up to almost any task by:

  • Delivering power when needed and efficiency when less power is called for
  • Monitoring, opening and closing valves for near-peak levels of torque across a wide range of engine speeds


No other competitor in Sierra 2500 Denali HD’s class5 offers a fully automatic locking rear differential for on or off-road use.

  • Delivers added traction in driving and wheel-slip situations
  • Senses a difference in speed between left and right rear wheels then locks to turn both wheels in unison


Stay confidently in command of your truck and whatever you may be hauling or trailering with these intelligent control features:

  • Available Hill Descent Control allows for a controlled descent in rough terrain without use of the brake pedal
  • StabiliTrak® intelligently braking and throttle inputs to help keep the vehicle on its intended path
  • Automatic Locking Rear Differential offers increased traction
  • Driver Shift Control lets you shift gears up and down with the tap of the shift selector


We engineered the new 2015 Sierra 2500 Denali HD to exceed your performance expectations, pushing it to the limit to deliver the kind of capability you demand.

  • 2015 GMC Sierra 2500 Denali HD heavy duty truck towing and hauling capabilities.
  • GMC Sierra 2500 Denali HD pickup truck driver control buttons.


Trailer confidently with Sierra 2500 Denali HD:

  • Maximum conventional trailering capacity up to 5,897 kg (13,000 lb.)6
  • Maximum fifth-wheel trailering capacity up to 7,756 kg (17,100 lb.)6
  • Maximum payload up to 1,430 kg (3,152 lb.)7


Sierra 2500 Denali HD offers available trailer safety and control at your fingertips:

  • Standard integrated trailer brake controller is located close to the steering wheel for easy adjustments and displays the level of brake force or "gain" in the Driver Information Centre
  • Trailer sway control technology helps keep both you and your trailer heading in the proper direction automatically, using sensors to detect the rocking of a swaying trailer and then applying the brakes (when properly equipped) to bring it back in line


To let you engage an extra measure of braking confidence on long grades or in Tow/Haul mode, Sierra 2500 Denali HD uses various technologies to ensure you stay at the desired speeds:

  • Available diesel exhaust brake uses engine compression to create “negative torque” to help slow the vehicle
  • Grade Braking that automatically senses when you want to slow down, and when the conditions are met, engages a Grade Braking shift schedule to help you maintain your desired speed
  • Four-wheel disc brakes


Sierra 2500 Denali HD’s standard trailering equipment gives you the capability to trailer just about anything. Equipment includes:

  • Trailering hitch platform
  • 63.5 mm (2.5”) receiver with 51 mm (2”) adapter
  • 7-pin and 4-pin wire connectors
  • Integrated Trailer Brake Controller


The 2015 GMC Sierra 2500 Denali HD’s state-of-the-art safety and driver alert technologies provide peace of mind and help prepare you for the unexpected.

2015 Sierra 2500HD pickup truck safety airbags.


GMC Sierra 2500 Denali HD’s advanced technologies pair intelligent engineering with driver-centric safety, using cameras or ultrasonic sensors to watch where you might not be looking. Sierra HD is the first heavy-duty pickup to offer this technology, which lets you know when you are approaching another vehicle too quickly or when you’ve left your driving lane. These available technologies include:

  • Forward Collision Alert
  • Lane Departure Warning
  • Safety Alert Driver Seat


Standard on Sierra Denali HD models is a 6-month trial subscription to the OnStar® Directions & Connections Plan. The plan includes:

  • Automatic Crash Response
  • Turn-by-Turn Navigation
  • Roadside Assistance
  • Emergency Services Link
  • Remote Door Unlock