RUGGED, POWERFUL, ONE-OWNER, OFF-LEASE, NONSMOKER, BUILT TO PULL ANYTHING! The 2025 GMC Sierra 3500HD Denali Ultimate continues to sit at the very top of the heavy-duty truck world, and this Duramax-powered example is equipped to tackle serious towing and hauling duties without sacrificing an ounce of luxury. Genuine 5th-wheel readiness and a thoughtfully selected set of factory and dealer-installed options round out an already impressive package. Under the hood, the 6.6-liter Duramax Turbo-Diesel V8 delivers a genuinely staggering amount of low-end torque, giving this Sierra the muscle to match its serious towing intentions. Why Shoppers Buy This Model The Sierra HD lineup has built its reputation on delivering genuine heavy-duty capability without asking buyers to sacrifice comfort or technology, and the Denali Ultimate trim takes that formula to its logical extreme. Its Duramax diesel option, robust ladder frame, and advanced trailering technology continue to make it a top choice for buyers who need serious capability in a daily-drivable package. Shoppers drawn to the Denali Ultimate trim consistently cite its combination of true work-truck capability and genuinely luxurious appointments -- open-pore wood, premium leather, and top-tier technology -- as reasons they chose it over a more utilitarian work truck. Automotive Press and Industry Recognition Reviewers have consistently praised the refreshed Sierra HD lineup for its dramatically improved towing technology and genuinely composed ride for a heavy-duty truck, with the Duramax diesel option earning particular praise for its class-leading torque output. Warranty The odometer is hovering around the 87,475-mile mark, and this Sierra 3500HD is STILL COVERED by GMC's factory warranty program. Remaining Transferable Factory Coverage Diesel Powertrain Limited Warranty -- Covers the Duramax engine, transmission, and drivetrain components, extended for 6.6L Duramax-equipped Sierra HD trucks. Expiration: 11/22/2029 or 100,000 miles, whichever comes first. Roadside Assistance -- 24/7 coverage including towing and emergency roadside support, matching the extended diesel powertrain term. Expiration: 11/22/2029 or 100,000 miles, whichever comes first. Extended service plans may be available to provide additional peace of mind and help protect your investment moving forward. Standard Features The Denali Ultimate trim sits at the very top of the Sierra HD lineup, and it shows throughout the cabin. Full-grain Alpine Umber leather seating, authentic open-pore Paldao wood trim, and 16-way power front seats with massage function give this Sierra a genuinely upscale feel that rivals dedicated luxury vehicles. Installed Options This Sierra 3500HD was ordered with a genuinely well-rounded list of factory and dealer-installed options, reflecting a buyer who wanted both serious capability and everyday convenience. Cargo Convenience Package Rear Underseat Storage Adds valuable secure storage space within the cabin itself. Console Vault Provides a genuinely secure, lockable storage solution within the center console. Gooseneck/5th Wheel Package Stamped Bed Holes with Caps Simplifies installing a gooseneck or 5th-wheel hitch without modifying the bed. 7-Pin Trailer Harness Provides the wiring needed to power trailer lighting and brakes right out of the box. Standalone Features Downpour Metallic Paint A genuine extra-cost finish that gives this Sierra a deep, distinctive presence over the standard color palette. Hitch Package Adds a properly rated receiver hitch for conventional towing needs. Molded Splash Guards, Black Helps protect the lower body panels and paint from road debris and moisture. Cargo Tie-Downs (Set of 4) Provides secure anchor points for keeping cargo in place during transit. Truck Capability This Sierra 3500HD carries a documented GVWR of 12,250 pounds and, with the Duramax diesel engine, is rated to tow up to 20,000 pounds conventionally in this crew cab configuration. The Gooseneck/5th Wheel Package's stamped bed holes and 7-pin trailer harness make stepping up to 5th-wheel or gooseneck towing straightforward, with capability well beyond the conventional rating when properly equipped. 4WD and the Duramax's massive low-end torque give this Sierra genuine confidence whether towing a heavy trailer, hauling equipment, or navigating challenging terrain. Mechanical Features Power comes from the 6.6-liter Duramax Turbo-Diesel V8, producing 470 horsepower and a tremendous 975 lb-ft of torque delivered as low as 1,600 rpm. It's an engine built for serious, sustained pulling power, paired with the Allison 10-speed automatic transmission that keeps the engine in its optimal torque band whether cruising empty or towing a heavy load. Four-wheel drive and a 3.42 rear axle ratio round out a drivetrain built specifically for heavy-duty work, giving this Sierra genuine confidence across a wide range of conditions and loads. Exterior Features Finished in Downpour Metallic -- a genuine extra-cost color choice -- this Sierra wears a deep, sophisticated finish that suits its commanding presence well. The Denali Ultimate trim's signature Vader Chrome grille and exclusive 20-inch wheels give this truck unmistakable road presence, while the molded splash guards help keep that finish looking sharp. Interior Features Inside, the Alpine Umber full-grain leather seating and open-pore Paldao wood trim create a cabin that feels genuinely upscale for a heavy-duty work truck. The 16-way power front seats with massage function add a level of comfort rarely found in this segment, while the Cargo Convenience Package's rear underseat storage and lockable console vault add genuine everyday security. Infotainment & Technology A 13.4-inch diagonal touchscreen with Google built-in anchors the cabin, providing an intuitive interface for navigation, media, and vehicle settings. GMC's ProGrade Trailering System adds advanced towing-assistance technology, helping the driver monitor and manage a trailer with genuine confidence. Safety Features This Sierra 3500HD comes equipped with a comprehensive suite of standard active safety technology, working quietly in the background to reduce driver workload and add confidence whether towing, hauling, or navigating everyday traffic. ... and there's SO MUCH more! If available, vehicle files can be found above this description on our website, including the original brochure and window sticker! Inspection findings identify the right A-pillar and B-pillar as kinked, with no further detail on the extent of either finding or whether repair work was performed. These are critical structural components supporting the roof and door frame, so we strongly recommend a professional inspection by a qualified body shop before purchase, in addition to a personal inspection of the vehicle. Between its serious Duramax towing muscle, genuinely luxurious Denali Ultimate cabin, and strong remaining diesel powertrain coverage, this Sierra 3500HD offers a rare combination of true heavy-duty capability and everyday comfort. Built to pull, refined to impress. We will happily evaluate your TRADE-IN and offer EXCELLENT FINANCE OPTIONS as well, so please give us a call at (Wall Township) or (Sewell) TODAY!
