Skip to product information
1 of 7

American Trucks Australia

2026 GMC SIERRA 3500HD AT4

2026 GMC SIERRA 3500HD AT4

Regular price $240,000.00 AUD
Regular price Sale price $240,000.00 AUD
Sale Sold out
Price excludes on-road costs (rego, stamp duty & transfer fees) Finance Available Delivery Australia Wide
Shipping calculated at checkout.

Custom Order

2026 GMC Sierra 3500HD AT4

4WD Crew Cab

Australia Complied & Right-Hand Drive Conversion

GVM
4,495 kg
Upgradable to 5,828 kg (NB2)
GCM
13,608 kg
Kerb Weight
3,157 kg
Payload
1,338 kg
Towing Capacity
4,500 kg

Drivetrain
4WD
10-Speed Automatic

For those who demand serious towing and payload capability without giving up off-road performance or interior luxury, the 2026 GMC Sierra 3500HD AT4 Crew Cab is the answer. Powered by the legendary 6.6L Duramax Turbo-Diesel V8 producing 350 kW and 1,322 Nm of torque, paired with the 10-speed automatic transmission, this truck is engineered to handle the heaviest caravans, fifth wheelers, machinery and commercial loads with confidence. The factory-fitted X31 Off-Road Package with Rancho twin-tube shocks, skid plates and hill descent control means it performs just as capably when the bitumen runs out.

AT4 Exterior
  • Costal Dune exterior paint
  • 20" High Gloss Black aluminium wheels — 8-spoke design
  • LT275/65R20 all-terrain tyres — full-size matching spare included
  • X31 Off-Road Package — Rancho twin-tube shock absorbers, off-road suspension and skid plates
  • Power retractable Black assist steps with LED lighting
  • GMC MultiPro Tailgate — six functional load and access configurations
  • Spray-on bedliner with GMC logo
  • 12 fixed cargo tie-down points rated at 226 kg per corner
  • Animated LED projector headlamps with LED daytime running lamps and IntelliBeam auto high beam
  • Integrated LED fog lamps
  • Animated LED signature tail, stop, turn and reverse lamps
  • Power sunroof
  • Deep tinted glass
  • Power-folding vertical trailering mirrors — heated, auto-dimming, turn signals, puddle lamps and perimeter lighting
  • High Gloss Black mirror caps
  • Rain-sensing front wipers
  • LED cargo bed lighting — activated by switch or key fob
AT4 Interior
  • Perforated leather seats — Jet Black with Kalahari accents
  • 10-way power driver seat with lumbar
  • 10-way power passenger seat with lumbar
  • Heated and ventilated front seats
  • Heated second row outboard seats
  • 60/40 folding rear bench with full under-seat storage
  • Heated leather-wrapped steering wheel
  • 13.4" Premium GMC Infotainment System with Google built-in
  • Wireless Apple CarPlay & Android Auto
  • Bose 7-speaker premium sound system with Richbass woofer
  • Adaptive cruise control
  • Remote vehicle start system
  • Wireless phone charging
  • Wi-Fi hotspot capable
  • Dual-zone automatic climate control
  • 12.3" reconfigurable multicolour digital driver display
  • Auto-dimming rearview mirror
  • Universal Home Remote
  • 120V AC power outlet — instrument panel and bed mounted
  • Premium floor liners front and rear
Off-Road Capability
  • X31 Off-Road Package — Rancho twin-tube shock absorbers
  • Short/long arm front suspension with torsion bars
  • 3-stage multi-leaf rear suspension
  • Electronic two-speed AutoTrac transfer case with push button control
  • Driver-selectable auto-locking rear differential
  • Hill descent control and hill start assist
  • Skid plates — oil pan, front axle and transfer case protection
  • Ground clearance: 284 mm
  • Digital Variable Steering Assist — auto-adjusts to speed and conditions
  • 4-wheel disc brakes with DURALIFE rotors
  • Fully-boxed hydroformed frame
  • Red recovery hooks
Towing Technology
  • Maximum towing capacity: 9,072 kg
  • 5th wheel hitch capacity: 9,661 kg
  • Front axle rating: 2,540 kg
  • Rear axle rating: 3,288 kg
  • Integrated trailer brake controller
  • ProGrade Trailering System with in-vehicle trailering app
  • Hitch Guidance with Hitch View — Pan/Zoom/Tilt
  • Trailer side blind zone alert
  • Trailer tyre pressure monitoring system
  • Bed view camera with two trailer camera provisions
  • 7-pin, 4-pin, 5th wheel and gooseneck wiring provisions
  • Electronic trailer sway control
  • Diesel exhaust brake
  • 136 L fuel tank
Safety Technology
  • Automatic emergency braking with front pedestrian braking
  • Forward collision alert with following distance indicator
  • Lane departure warning
  • HD Surround Vision — 360° overhead camera view
  • Front and rear ultrasonic park assist
  • Rear cross traffic alert
  • Trailer side blind zone alert
  • StabiliTrak stability and traction control with roll avoidance
  • Dual-stage front airbags, seat-mounted side airbags and curtain airbags
  • Tyre pressure monitoring with auto-learn and fill alert
  • OnStar emergency services capable
🛡

3-Year Unlimited Kilometre Warranty

Professionally converted to Right-Hand Drive and fully ADR compliant for Australian registration. Comprehensive warranty package includes roadside assistance.

Enquire Today to Secure This Truck One of the most capable heavy-duty trucks available on the Australian market — combining serious towing performance, off-road capability and premium comfort in one package.

Disclaimer: Photos displayed are for reference purposes only and may not represent the exact vehicle available. Specifications, features, and colours may vary. All prices exclude on-road costs including registration, transfer fees, stamp duty, and any other government or statutory charges unless otherwise stated. All weights, measurements and towing figures displayed are approximate only and are based on manufacturer data. These figures may vary depending on vehicle configuration, options fitted, and operating conditions. It is the customer's sole responsibility to conduct their own independent research and seek appropriate professional advice to verify all specifications, weights, and ratings prior to purchase. American Trucks Australia accepts no liability for any reliance placed on the figures displayed.
View full details