Getting to Know the Trim Levels of the 2025 GMC Sierra HD: Professional Grade Heavy-Duty

Pro

The base trim is equipped with a 6.6L V8 gas engine and a 10-speed automatic transmission. To aid with towing, GMC throws in its standard Trailering Package, which comes with trailering mirrors and trailer brake control. While focused on its durability and towing, it’s also set with Apple CarPlay and Android Auto compatibility to keep you and your passengers entertained on long drives.

SLE

The SLE is a step up from the Pro with its inclusion of a 13.4-inch diagonal touchscreen, a 12.3-inch diagonal Driver Information Center, 17-inch aluminum wheels, and the ability to select your traction level with Tow/Haul mode.

SLT

If you’re looking for more luxury, the SLT is automatically fitted with a heated steering wheel, driver’s seat, and front passenger seat with lumbar support. It also boasts the GMC MultiPro Tailgate, dark gray-accented 18″ aluminum wheels, and GMC’s ProGrade Trailering System with app access.

AT4

Upgrading to the AT4 will make your vehicle more off-road-ready with new features such as adaptive cruise control, twin-tube Rancho shocks, skid plates, and Hill Descent Control. The appearance also gets upgraded with 20-inch glossy black wheels, a black and Kalahari-accented interior, and a new exterior grille.

Denali

The Denali sets itself apart from the latter trim levels with the addition of chrome accents, aluminum trim, wood detailing, perforated leather seating, and an embroidered Denali logo on the interior. It also shows off 20-inch Ultra Bright wheels with chrome inserts. Denali owners also get to enjoy 12-way powered front seats with heating and ventilation for added comfort.

AT4X

Get more bang for your buck when upgrading from the AT4 to the AT4X. To start, you’ll be greeted with 35-inch tires, full-grain leather seating, and interior ash wood accents. You’ll also get a 1.5-inch suspension lift, rear electronic-locking differential, Multimatic DSSV dampers, and larger steel transfer and front aluminum skid plates. It also features 16-way powered front seats with massage integration, heating, and ventilation.

Denali Ultimate

Get the most power with the Denali Ultimate, which features a Duramax 6.6L Turbo-Diesel V8 Engine with 975 LB-Ft of torque and 470 horsepower. Other standard features include a 12-speaker sound system, illuminated power-assist steps, a MultiPro Tailgate audio system, paldao wood interior accents, 16-way powered front seats with massage integration, a signature chrome grille, and 20-inch Ultra Bright wheels with glossy black inserts.

Think you can handle what the new 2025 GMC Sierra Heavy Duty has in store? Visit Marquardt of Barrington GMC in Barrington, IL today for a test drive.

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