The 2023 GMC Sierra 2500HD Denali Crew Cab 4WD with the 6.6L Duramax Turbo-Diesel is a luxury heavy-duty pickup truck built for high-end towing and premium comfort. 6.6L Duramax Turbo-Diesel V8Horsepower: 445 hp at 2,800 RPMTorque: 910 lb-ft at 1,600 RPMTransmission: Allison 10-speed automaticDrivetrain: Four-wheel drive (4WD). Max Towing Capacity: Up to 18,500 lbsPayload Capacity: Around 3,589 to 3,862 lbs (varies by configuration)Seating: 5 to 6 passengers in a spacious Crew Cab. Interior: Perforated leather-appointed seats with heating and ventilation, 10-way power-adjustable front seats, and a heated steering wheel.Technology: 8-inch infotainment system with navigation, wireless Apple CarPlay and Android Auto, a 7-speaker Bose premium audio system, and an available head-up display.Exterior: Signature chrome grille, bold 20-inch wheel options, and the versatile MultiPro six-way power tailgate.Safety & Trailering: ProGrade trailering system with multiple camera views to make hitching and hauling easier.