A high-specification and impressively capable full-size American pickup, this GMC Sierra 2500HD AT4 combines rugged utility with a host of premium comfort features and powerful towing performance. It is powered by a 6.6-litre Duramax turbocharged V8 diesel engine, producing 332kW and 1,220Nm of torque, driving all four wheels via a 10-speed automatic transmission. This original Australian-market example passed compliance in December 2020. It is now offered for sale by its first and only owner from new. The odometer shows a relatively modest 27,170 Kms from new. Build year: January 2020 This Sierra 2500HD AT4 is finished in the commanding shade of Onyx Black, over a black leather-trimmed interior, featuring contrasting tan leather seat accents and stitching, embroidered ‘AT4’ emblems on the front headrests, and brushed aluminium-effect trim. It rides on a set of 20-inch twin six-spoke alloy wheels finished in satin-black, fitted with Nitto Ridge Grappler tyres. Equipment includes LED driving lights, front and rear parking sensors, cruise control, a touch-screen infotainment system with satellite navigation, Apple CarPlay and Android Auto, a Bose premium audio system, dual-zone automatic air conditioning, the full Premium Package, an electric sunroof, a MultiPro tailgate, side steps, a ceramic coating, heated and ventilated front seats, heated rear seats, and a heated steering wheel. There is also a trailer camera, a remote-controlled electric bed cover, the gooseneck preparation kit, bed-mounted 12-volt outlet plugs, towbar-mounted 12-volt power, cargo bed lighting, a 4,500kg braked towing capacity, 12,000kg max towing, and a 1,400kg payload rating. This example has been fitted with a Banks cold air intake and a Banks tuner with a Power iDash system. The truck comes with the owner's handbook and a service receipt, plus two keys. Please refer to the photo gallery to assess the exterior and interior condition. This GMC Sierra 2500HD AT4 is a versatile yet luxurious heavy-duty pickup, built to handle serious towing tasks while offering premium interior comfort and a suite of modern features. With desirable factory equipment, modest mileage, and well-considered performance upgrades, it offers both capability and refinement in equal measure. A compelling choice for those seeking a powerful utility vehicle equally suited to long hauls or leisure use.