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2026 GMC Sierra 3500 HD AT4 Onyx Black (VIN 1GT4UVEY3TF224382) (Stock 36429)
2026 GMC Sierra 3500HD AT4 in Onyx Black commands the road with the raw, effortless torque of its 6.6L turbo-diesel engine. Whether you’re hauling heavy equipment to the job site or navigating remote trails with the confidence of AutoTrac 4WD, this truck balances brute capability with a refined cabin. Inside, the heated steering wheel and premium Jet Black interior offer a quiet sanctuary after a long day of work. It’s a powerful, purpose-built machine designed to handle the toughest tasks without breaking a sweat.