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2026 GMC SIERRA 1500 AT4 4WD 3.0L DURAMAX DIESEL CARBONPRO AT4 PREMIUM SUNROOF BOSE AUDIO ONYX BLACK LANCASTER PA
This 2026 GMC Sierra 1500 AT4 4WD is powered by the 3.0L Duramax turbo-diesel paired with a 10-speed automatic transmission. Finished in Onyx Black with a Jet Black and Kalahari leather interior, this loaded AT4 features the CarbonPro Edition, AT4 Premium Package, power sunroof, Bose audio, Kicker MultiPro Tailgate Audio, and 20-inch wheels.
The 3.0L Duramax delivers 305 horsepower and an impressive 495 lb-ft of torque, giving you excellent pulling power, smooth highway performance, and outstanding fuel efficiency for a full-size truck. It's an ideal combination for daily driving, long trips, and towing a camper or boat.
The AT4 comes ready for adventure with a factory 2-inch suspension lift, off-road-tuned suspension, automatic locking rear differential, Hill Descent Control, and red recovery hooks. Whether you're heading to a hunting property, remote campsite, or muddy job site, this truck has the capability to get you there.
One of the biggest upgrades is the CarbonPro Edition, featuring GMC's carbon-fiber composite bed designed to resist dents, scratches, and corrosion. Combined with the black chrome grille accents, high-clearance running boards, and 20-inch machined wheels, this Sierra has an aggressive, premium appearance.
Inside, you'll find heated and ventilated front leather seats, heated rear seats, Bose premium audio, wireless charging, remote start, and a power-sliding rear window. The sunroof and distinctive Kalahari accents make the cabin feel especially upscale.
Technology includes HD Surround Vision, navigation, front and rear parking sensors, Rear Cross Traffic Braking, Rear Pedestrian Detection, and Trailer Side Blind Zone Alert.
For towing, you get an integrated trailer brake controller, Hitch Guidance with Hitch View, trailer camera provisions, and GMC's in-vehicle trailering app. The Kicker MultiPro Tailgate Audio System is another great feature for camping and tailgating.
Additional equipment includes rain-sensing wipers, LED bed lighting, 120-volt outlets, premium floor liners, and rear wheelhouse liners.
Finding an AT4 with the Duramax diesel, CarbonPro bed, Premium Package, sunroof, and Kicker audio makes this an especially desirable truck. Plus, the odometer is 1,226 miles below the market average!
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.