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Denali, SLT, All Terrain X, 2500HD & 3500HD

Why go amateur when only Professional Grade will do.

Denali is the height of premium. Its purposeful design creates an impactful presence and helps reduce wind noise for a quiet, premium cabin. Not to be outdone, Denali’s most innovative cargo box also offers features to help you load and secure cargo.

The Sierra Denali HD cabin is loaded with premium materials, along with French seam stitching, supportive heated and ventilated leather-appointed front bucket seats and generous storage.

Sierra HD trucks are designed, engineered and built to help you achieve more with the heavy-duty capability of the available 6.6L Duramax Turbo Diesel, paired with the Allison® 1000 transmission.

Sierra Denali HD offers robust payload and trailering as well as premium comfort and technology.


6.6 Litre V8 Turbo Diesel


332 kw @ 2800 rpm


1233 nm @ 1600 rpm


2.502 tonne

GMC Sierra Gallery

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Drive train and mechanical

  • 6.6 litre Duramax V8 Diesel Engine with direct injection.
  • Allison 1000 6-speed automatic transmission, electronically controlled with overdrive for smooth-shifting performance. Includes Tow/Haul mode and electronic Powertrain Grade Braking.
  • Independent torsion bar, includes 51mm twin-tube shock absorbers and 33mm front stabiliser bar, and semi-elliptical, multi-leaf rear suspension.
  • 4-wheel drive, 2 speed transfer case.

Exterior Features

  • Integrated wheel arch mouldings.
  • Remote power locking tailgate.
  • EZ Lift and Lower Tailgate.
  • CornerStep rear bumper.
  • 4 x movable high-mounted tie-downs. (Opt)
  • Box rail caps.
  • Projector-beam headlamps. Includes GMC signature LED Lighting.
  • Front frame-mounted recovery hooks.
  • Outside spare-tyre carrier, winch type, includes lock.
  • Front intermittent wipers.

Interior Features

  • Folding rear 60/40 split 3-passenger bench.
  • Includes child seat top tether anchor.
  • Cruise Control.
  • Rear vision camera system with dynamic gridlines.
  • 12-Way Power Front Seats with Driver Memory.
  • Optional Driver Alert package.
  • Denali-Exclusive Customisable Driver Display.
  • Bose Premium 7-Speaker Audio System.

Safety Features

  • Daytime running lamps with automatic lamp control.
  • Up to Six Air Bags.
  • StabiliTrak Stability Control System.
  • Proactive Roll Avoidance
  • Traction Control.
  • Electronic Trailer Sway Control
  • Hill Start Assist.
  • Tyre pressure monitoring system.

Disclaimer: While every effort is made to ensure all information supplied is correct, some features may be model specific or vary depending on options pack. Please contact dealer to verify specifications and availability