2025 GMC Sierra 2500HD

The 2025 GMC Sierra 2500 HD lineup offers a range of trims designed to meet every demand, from hard-working functionality to elevated luxury.

Pro: At the foundation, the Pro trim emphasizes durability and utility with its standard 6.6L V8 gas engine, 10-speed Allison transmission, integrated trailering equipment, and seamless smartphone connectivity through wireless Apple CarPlay® and Android Auto™.

SLE: Stepping into the SLE, drivers gain a larger 13.4-inch premium infotainment display, the versatile Traction Select system with Tow/Haul mode, and access to the innovative MultiPro™ tailgate, which can even be enhanced with a built-in Kicker® audio system.

SLT: The SLT trim raises refinement with heated and ventilated 10-way power front seats and access to the ProGrade® Trailering System, which integrates up to 14 available camera views to make hauling simpler and safer.

AT4: For those who crave adventure, the AT4 channels an off-road spirit with a purpose-built suspension, exclusive styling touches, and advanced trailering technology that inspires confidence when leaving paved roads behind.

AT4X: The AT4X builds on that foundation with even more distinctive elements, including smoked-amber roof marker lamps, a power sunroof, retractable illuminated assist steps, and bold high-gloss black wheels wrapped in mud-terrain tires.

Denali: The Denali trim refines the Sierra’s presence with Forge-perforated leather seating, authentic wood accents, and the immersive sound of a Bose® 12-speaker audio system, creating an atmosphere of premium comfort.

Denali Ultimate At the very top of the range, the Denali Ultimate stands as the pinnacle of GMC craftsmanship, showcasing Alpine Umber full-grain leather, a signature Vader Chrome grille, and 16-way power front seats with massage capability, transforming every journey into a commanding yet indulgent experience.

At its core, the Sierra 2500 HD delivers industrial-grade performance with two robust powerplants: the standard 6.6L V8 gas engine producing 401 hp and 464 lbs.-ft. of torque, and the available Duramax® 6.6L Turbo-Diesel V8 delivering 470 hp and a staggering 975 lbs.-ft. of torque.

Both are paired with a 10-speed Allison automatic transmission and available in 2WD or 4WD. When properly equipped, the Sierra 2500 HD offers a maximum conventional towing capacity of up to 20,000 lbs. with the diesel, and up to 22,500 lbs. with a gooseneck or fifth-wheel setup. Payload reaches as high as 4,064 lbs., making it a true workhorse.

Inside, the Sierra 2500 HD Crew Cab offers Best-in-Class front headroom (43.03 inches) and legroom (44.53 inches), ensuring comfort even on long drives. Practical cargo solutions range from 69.5 to 83.5 cu. ft., depending on cab and bed configuration.

Higher trims elevate the cabin with full-grain leather, authentic wood accents, and 16-way power front seats with massage capability—bringing luxury to the heavy-duty segment.

The centerpiece of the cabin is a 13.4-inch premium infotainment system with Google built in, voice command, and seamless smartphone integration. A 12.3-inch Driver Information Center and available 15-inch Head-Up Display present vital data with clarity.

For trailering, the ProGrade® system offers up to 14 available camera views, trailer profiles, an in-vehicle trailering app, and blind-zone alerts designed specifically for trailers.

Standard GMC Pro Safety includes Forward Collision Alert, Automatic Emergency Braking, and Lane Departure Warning. Available enhancements include Adaptive Cruise Control with trailering, Transparent Trailer View, Trailer Sway Control, and pre-departure safety checklists providing reassurance whether navigating busy Baton Rouge highways or towing through Louisiana's countryside.

For professionals and enthusiasts across Ascension Parish and beyond, Ross Downing GMC of Gonzales invites you to experience the 2025 Sierra 2500 HD firsthand. From raw capability to refined luxury, there is a Sierra tailored to match your ambitions and elevate every drive.