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2026 GMC SIERRA 2500HD DENALI ULTIMATE 4WD 6.6L DURAMAX DIESEL 5TH WHEEL PREP SUNROOF X31 STERLING METALLIC LANCASTER PA
This 2026 GMC Sierra 2500HD Denali Ultimate 4WD is powered by the 6.6L Duramax V8 turbodiesel paired with the 10-speed automatic transmission. Finished in Sterling Metallic with an Alpine Umber full-grain leather interior, this truck combines serious heavy-duty capability with the flagship comfort of the Denali Ultimate.
The 6.6L Duramax is the reason to start here. With 470 horsepower and 975 lb-ft of torque, it's built for the jobs where a half-ton simply isn't enough. Heavy trailers, fifth-wheel campers, equipment and long highway pulls are exactly where this powertrain earns its keep.
And this one is already set up to tow.
The factory Gooseneck/5th Wheel Prep Package gives you the integrated bed provisions for serious trailers. You also get trailer camera provisions and viewing software, a Bed View Camera, Trailer Side Blind Zone Alert, trailer tire-pressure monitoring and HD Surround Vision. Hooking up and keeping an eye on what's behind you is a whole lot easier when the truck was designed around towing from the start.
The X31 Off-Road Package and off-road suspension add capability away from pavement, while the two-speed transfer case and Hill Descent Control give you more control when conditions get ugly. The Snow Plow Prep/Camper Package adds even more versatility for someone buying this truck to actually use it.
Then you climb inside and basically forget you're sitting in a heavy-duty pickup.
The Denali Ultimate cabin gets gorgeous Alpine Umber full-grain leather, heated and ventilated front seats, heated rear seats, a 15-inch Head-Up Display, Rear Camera Mirror, Bose 12-speaker premium audio, wireless charging, Connected services and a power sunroof.
Outside, the body-color wheel arch moldings are a small detail that makes a surprisingly big difference. Combined with Sterling Metallic and the distinctive Vader Chrome Denali Ultimate grille, they give this 2500HD a cleaner, more finished look than the typical heavy-duty truck.
The factory spray-in bedliner, LED bed lighting, power-sliding rear window and 120-volt bed outlet make sure all the luxury hasn't gotten in the way of usefulness either.
If you're looking for a 2026 GMC Sierra 2500HD Denali Ultimate Duramax near Lancaster, this is the kind of configuration worth holding out for. Duramax diesel, 5th-wheel prep, X31, sunroof, Technology Package, Alpine Umber leather and body-color wheel arches all in one truck.
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.