Introducing the 2025 GMC Sierra Heavy Duty—a sleek and stylish crossover that combines modern design with advanced features. This sophisticated vehicle offers a spacious interior, cutting-edge technology, and exceptional comfort, making every drive a pleasure. With its striking exterior and versatile interior, the 2025 Sierra Heavy Duty is designed to elevate your driving experience and cater to your lifestyle needs.
If you're located in Hartford, Newington, Berlin or the surrounding areas, we're the GMC dealer for you. Shop the 2025 GMC Sierra Heavy Duty today at Gallagher GMC.
Enjoy exceptional comfort with the Sierra Heavy Duty's available best-in-class 16-way power front seats, which include a massaging feature.
The Sierra HD Denali Ultimate’s Alpine Umber interior boasts full-grain leather seats, braided contrast stitching, and embossed, laser-etched topographical map designs of Mt. Denali’s peak.
The Sierra Heavy Duty truck offers best-in-class front head and leg room in the Crew Cab.
This available tablet-style touchscreen, the largest in its class, serves as the customizable, high-tech centerpiece of the cabin.
