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2025 GMC SIERRA 1500 AT4 4WD 6.2L V8 TECHNOLOGY PACKAGE AT4 PREMIUM SUNROOF SURROUND VISION ONYX BLACK LANCASTER PA
This 2025 GMC Sierra 1500 AT4 4WD is powered by the 6.2L EcoTec3 V8 paired with a 10-speed automatic transmission. Finished in Onyx Black with a Jet Black and Kalahari leather interior, this is a loaded AT4 with the Technology Package, AT4 Premium Package, AT4 Preferred Package, power sunroof, Bose audio, HD Surround Vision, and advanced trailering technology.
The 6.2L V8 produces 420 horsepower and 460 lb-ft of torque. It is the big gas engine in the Sierra 1500 lineup and gives this AT4 strong acceleration, plenty of passing power, and excellent performance when towing or hauling. For buyers who want a traditional V8 in a premium off-road truck, this is the engine to have.
AT4 gives you more than rugged styling. This truck includes an off-road focused suspension, auto-locking rear differential, Hill Descent Control, heavy-duty air filter, red recovery hooks, and high-clearance steps. It is built to handle rough access roads, campsites, hunting property, and everyday Pennsylvania weather while still driving like a premium half-ton.
The Technology Package is a major upgrade. You get a multicolor 15-inch Head-Up Display, HD Surround Vision, Bed View Camera, and Rear Camera Mirror. Together, these systems make a full-size truck much easier to maneuver and give you better visibility when parking, hooking up a trailer, or checking cargo in the bed.
Inside, the AT4 Premium and Preferred equipment creates a comfortable cabin with heated and ventilated front seats, heated second-row outboard seats, wireless charging, a power sliding rear window, rain-sensing wipers, dual-zone climate control, and premium Bose 7-speaker audio. The power sunroof adds even more to the upscale feel.
This Sierra is also properly equipped for towing. The Trailering Package includes an integrated trailer brake controller, Hitch Guidance, Hitch View, an in-vehicle Trailering App, Trailer Side Blind Zone Alert, and trailer camera provisions.
The bed is protected by a factory spray-on bedliner with GMC logo and includes LED cargo lighting and a 120-volt outlet. A second 120-volt outlet inside the cab adds more versatility for tools and electronics.
Onyx Black works especially well on the AT4, tying together the dark grille details, off-road hardware, and aggressive stance.
If you want a Sierra AT4 with the 6.2L V8 and the right luxury and technology packages, this is an excellent configuration. You get V8 power, leather, heated and ventilated seats, a sunroof, Head-Up Display, Surround Vision, premium audio, and serious trailering equipment.
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.