2026 GMC Sierra 3500 HD AT4
Vehicle Make:
2026 GMC Sierra 3500 HD
Cab & Box Options:
Crew Cab – Standard or Long Bed
Trim Options:
AT4
Engine Options:
6.6L V8 Petrol, 6.6L Duramax Turbo diesel
Built for those who demand more from every journey.
The 2026 right hand drive GMC Sierra 3500HD SRW AT4 takes capability to the next level. Engineered for serious towing, hauling, and off-road exploration, it combines heavy-duty strength with advanced AT4 off-road technology to conquer challenging terrain with confidence. From its factory-lifted stance and off-road-tuned suspension to its premium interior designed for all-day comfort, the Sierra 3500HD SRW AT4 delivers a commanding presence on any road. Whether you’re navigating rugged worksites, remote trails, or long-distance adventures, this powerhouse provides the perfect balance of durability, refinement, and unstoppable performance. When you need a truck that works as hard as you do — and looks good doing it — the Sierra 3500HD SRW AT4 stands in a class of its own.
Ready for Tough Australian Conditions.
Converted to right-hand drive by Autogroup International with full ADR compliance, the 2026 Sierra 3500HD AT4 features a heavier-duty suspension, upgraded braking, a stronger rear axle, and higher ground clearance, allowing it to manage greater payload and towing forces while maintaining stability and control on challenging terrain.
Drivers who prioritise comfort and daily drivability may prefer the 2500HD AT4, but for those who require maximum towing, superior braking confidence, improved load handling, and enhanced off-road stance, the 3500HD SRW AT4 delivers unmatched heavy-duty performance.
Backed by a 5-year unlimited kilometre warranty and nationwide support, the Sierra 3500 AT4 delivers uncompromising strength and capability without sacrificing refinement or comfort.
Experience The GMC Sierra 3500
AT4 Crew Cab Standard Bed
Featuring off-road tuned suspension, skid plates, advanced 4WD with hill descent control, and Twin-Tube Rancho® shocks. Includes a 13.4″ infotainment display and premium leather-appointed interior with distinctive accents. The 6'9" Standard Bed provides versatile cargo capacity without the extra length of a long-bed truck — ideal for buyers who want serious towing and hauling performance while still maintaining maneuverability in suburban streets, job sites, and tight parking areas.
AT4 Crew Cab Long Bed
Built for buyers who demand maximum load length, bed volume, and heavy-duty towing stability, the GMC Sierra 3500HD AT4 Crew Cab Long Bed — converted to Right-Hand Drive by Autogroup International — is the top choice for Australia’s toughest applications. The extended 8'2" Long Bed increases cargo space dramatically, making it ideal for construction, agriculture, towing operations, and long-haul touring where equipment size matters.
Leader in Right Hand Drive American Vehicle...
Is there a warranty for the vehicles you sell?
Every vehicle includes a Factory-Backed 3-Year Warranty with conditions identical to the original manufacturer's warranty.
Are your right-hand drive conversions compliant with Australian standards?
Absolutely. Our vehicles meet Australian Motor Vehicle Standards Act requirements and we're ISO 9001:2015 certified for RHD conversions.
Where do you provide servicing in Australia?
All servicing is performed at our Australian facility, based in Melbourne, by our trained technicians who specialise in converted American vehicles.
Do you supply genuine spare parts?
Yes. Our Australian parts team stocks OEM-grade service parts, accessories, and consumables specifically for converted American vehicles.
Can I schedule a test drive?
Absolutely! You can schedule a test drive by heading over to the contact page and getting in touch with our team.