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2025 GMC SIERRA 3500HD DENALI ULTIMATE 4WD 6.6L DURAMAX DIESEL 5TH WHEEL PREP MASSAGE SEATS PAINTED WHEEL ARCHES ONYX BLACK LANCASTER PA
This 2025 GMC Sierra 3500HD Denali Ultimate 4WD is powered by the 6.6L Duramax turbo-diesel V8 paired with a 10-speed Allison automatic transmission. Finished in Onyx Black with an exclusive Alpine Umber full-grain leather interior, this luxury heavy-duty pickup features the Gooseneck/5th Wheel Prep Package, massaging front seats, power sunroof, Technology Package, and body-color wheel arch moldings.
The 6.6L Duramax produces an impressive 470 horsepower and 975 lb-ft of torque, delivering exceptional pulling power for large fifth-wheel campers, equipment trailers, and demanding workloads. Combined with four-wheel drive and the Allison transmission, this Sierra 3500HD offers serious heavy-duty capability without sacrificing comfort.
Inside, the Denali Ultimate delivers GMC's highest level of luxury. The exclusive Alpine Umber full-grain leather interior features premium materials, heated and ventilated front seats with massage functionality, heated rear outboard seats, and a Bose Premium Series 12-speaker sound system. A power sunroof and power-sliding rear window add to the upscale driving experience.
The Technology Package includes a 15-inch multicolor Head-Up Display, HD Surround Vision, Rear Camera Mirror, and Bed View Camera. These advanced features provide excellent visibility when parking, maneuvering in tight spaces, or connecting a trailer.
The factory Gooseneck/5th Wheel Prep Package is a major highlight for buyers planning to tow larger trailers. GMC's ProGrade Trailering System adds Hitch Guidance with Hitch View, trailer camera provisions, an in-vehicle trailering app, Trailer Side Blind Zone Alert, and trailer tire pressure monitoring sensors for added convenience and confidence.
The X31 Off-Road Package, two-speed transfer case, and Hill Descent Control provide additional capability for rough roads, campsites, and challenging terrain.
Onyx Black gives this Denali Ultimate a bold, sophisticated appearance, complemented by its signature Vader Chrome grille, smoked amber roof marker lamps, and desirable body-color wheel arch moldings. The painted wheel arches create a cleaner, more finished look compared with traditional black moldings.
Additional features include a factory spray-on bedliner, 120-volt bed and interior power outlets, wireless charging, wireless smartphone connectivity, remote start, rain-sensing wipers, Rear Cross Traffic Alert, and front and rear parking sensors.
Mileage is another major advantage, with the odometer reading an impressive 13,985 miles below the market average.
With its powerful Duramax diesel, exclusive Alpine Umber interior, massaging seats, factory fifth-wheel prep, painted wheel arches, advanced trailering technology, and exceptionally low mileage, this 2025 GMC Sierra 3500HD Denali Ultimate offers an outstanding combination of luxury and heavy-duty performance.
See it today at Mark Martin Motors in Ephrata, serving Lancaster, Lititz, Lebanon, and York. Call or message us to check availability or schedule your test drive.