2026 GMC Sierra 2500 HD AT4X Pickup

The right hand drive 2026 GMC Sierra 2500 HD AT4X from Autogroup International represents the pinnacle of off-road strength, premium craftsmanship, and heavy-duty capability. Starting with a Crew Cab finished in Summit White with an exclusive Obsidian Rush interior, and powered by the 6.6-litre Duramax Turbo Diesel V8 paired to the smooth-shifting Allison 10-speed automatic transmission, each vehicle undergoes a mirror-image right-hand drive conversion to full ADR compliance in our ISO 9001-certified engineering facility. Every build is backed in Australia with a 5-year unlimited-kilometre warranty, a 40,000 km spare parts kit, and 24/7 roadside assistance.

The AT4X takes the Sierra’s renowned off-road performance to the next level, featuring Multimatic DSSV spool-valve dampers, front and rear electronic locking differentials, and a factory-installed AEV (American Expedition Vehicles) off-road package. It includes heavy-duty stamped steel front and rear bumpers with recovery points, multiple skid plates for maximum underbody protection, and unique 18-inch gloss black AEV wheels fitted with Goodyear Wrangler Territory MT tyres. A two-speed Autotrac transfer case and selectable off-road drive modes ensure exceptional traction and control in even the harshest terrain.

Inside, the Sierra 2500 HD AT4X blends rugged functionality with upscale refinement. The Obsidian Rush interior features premium full-grain leather seating with red and white accent stitching, authentic Vanta Ash wood trim, and AEV-branded details. Technology highlights include a 13.4-inch GMC Premium Infotainment System with Google built-in, a 12.3-inch digital driver display, and a 15-inch multicolour head-up display. Comfort comes standard with heated and ventilated front seats, heated rear outboard seats, a power sunroof, dual-zone climate control, and a 60/40 split-folding rear bench for flexible utility.

Safety and driver-assistance technologies include Forward Collision Alert, Lane Departure Warning, Front Pedestrian Braking, IntelliBeam automatic high beams, Trailer Sway Control, and an Integrated Trailer Brake Controller with a dedicated Trailering App for enhanced towing management.

For Australian buyers seeking a top-tier heavy-duty pickup that fuses extreme off-road engineering with luxury and precision, the 2026 GMC Sierra 2500 HD AT4X Diesel delivers unmatched capability — engineered, converted, and supported by Autogroup International.

Buy the Autogroup International right hand drive 2026 GMC Sierra 2500 HD AT4X direct from Australia’s largest specialist American-vehicle remanufacturer, not a dealer. We source, engineer and support your truck end to end, so there is one accountable team and no outsourcing runaround. Every vehicle is built under ISO 9001:2015 quality systems, is fully ADR compliant, and completes a documented 1,626-point quality check to protect OEM functionality. Autogroup International is 100% Australian owned, founded by Peter Hill and led by Rob Hill, with 250+ team members (including 35+ engineers) and 5,000+ vehicles delivered across 40+ countries.

Your 2026 GMC Sierra 2500 HD AT4X is protected by Australia’s best American pickup truck warranty package: a five-year unlimited kilometre, bullbar-to-towbar full-vehicle warranty, insurance-backed and underwritten by an APRA-regulated insurer, plus a complimentary 40,000 km service-parts pack and five years of 24/7/365 premium roadside assistance (unlimited callouts, trailer and caravan towing, and up to $3,000 breakdown benefits). We also include free delivery Australia wide and a 6-month delivery guarantee from order to delivery (or we pay $1,000 per week if we’re late). 

Call our Melbourne team on (03) 9765 1300 or email [email protected] for availability, pricing and your confirmed build slot.