2025 GMC Sierra 3500 HD vs. 2025 RAM 3500

Heavy-duty trucks are built to take on the toughest jobs while offering modern convenience and refined comfort. For 2025, both GMC and RAM have pushed their limits to deliver two standout contenders in the segment-the GMC Sierra 3500 HD and the RAM 3500. While each model brings impressive features to the table, a closer comparison reveals how they differ across design, innovation, power, and ownership experience.

Design & Style

Both trucks have undergone visual enhancements for the 2025 model year, with the goal of blending utility and modern aesthetics. The GMC Sierra 3500 HD features a commanding front-end presence, bold grille designs specific to each trim, and distinctive C-shaped LED lighting. Its upscale trims showcase a high level of detail, including premium materials and Denali-exclusive styling cues. The Sierra's refined proportions and updated wheel designs strike a balance between rugged performance and visual sophistication.

The 2025 RAM 3500 also introduces subtle design changes, such as trim-specific fascias, updated LED headlamps, and new wheel options. Though aggressive in appearance, its design leans more toward traditional heavy-duty truck styling. Where the RAM holds its own is in the variety of trim finishes and available color combinations, catering to those seeking both boldness and functionality. However, its overall look feels slightly more conservative compared to the refined yet assertive styling of the Sierra.

Technology & Safety

Inside the cabin, both models elevate the experience with advanced technology and driver-focused layouts. The GMC Sierra 3500 HD leads with a 13.4-inch touchscreen and a 12.3-inch digital driver display, seamlessly integrated with Google Built-In, wireless smartphone connectivity, and up to 14 available camera views for improved visibility. Upper trims include features like head-up display, premium Bose audio, and trailering-specific technology designed for confidence on and off the road.

RAM's 2025 3500 model introduces a new 14.5-inch infotainment touchscreen and an available 10.25-inch passenger-side display. Its Uconnect 5 system is fast and user-friendly, with access to entertainment, climate, and navigation settings. Though RAM's interior tech is competitive, it lacks some of the trailering-specific support and customizable digital interfaces found in the Sierra. On the safety front, both trucks offer a suite of driver-assist features, including adaptive cruise control and lane-keeping aids, with slight variations depending on trim level.

Performance

Performance is a focal point for both trucks, particularly for those who rely on heavy-duty capabilities for towing and hauling. The 2025 GMC Sierra 3500 HD offers two engine options: a 6.6L V8 gas engine producing 401 horsepower and 464 lb-ft of torque, and a 6.6L Duramax Turbo-Diesel V8 delivering up to 470 horsepower and a commanding 975 lb-ft of torque. When properly equipped, the Sierra can tow up to 36,000 pounds. Paired with the 10-speed Allison transmission, it delivers smooth shifting and power distribution, whether on pavement or a job site.

The 2025 RAM 3500 counters with its high-output 6.7L Cummins Turbo Diesel engine that now delivers 430 horsepower and a best-in-class 1,075 lb-ft of torque. This engine is paired with a new TorqueFlite 8-speed automatic transmission, designed to handle the increased output. The RAM matches the Sierra with a maximum towing capacity of 36,610 pounds, though this figure applies specifically to certain configurations. While both trucks perform exceptionally well, the Sierra's refined ride quality and wider range of trim-specific capabilities may appeal to a broader range of drivers.

The Bottom Line

Choosing between the 2025 GMC Sierra 3500 HD and the RAM 3500 comes down to personal priorities. RAM delivers raw power and towing performance with updates that cater to traditional heavy-duty buyers. It provides a functional interior with plenty of available tech and a solid lineup of trims suited for work and family life alike.

On the other hand, the Sierra 3500 HD offers a more polished driving experience across the board. It combines serious muscle with advanced technology, modern design, and refined comfort, creating a package that excels in daily usability and long-haul reliability. From worksite to weekend, the Sierra stands out as a versatile and well-rounded choice in the heavy-duty truck market.

Schedule a Test Drive Today

If you're ready to experience what sets the 2025 Sierra 3500 HD apart, we invite you to schedule a test drive with us at GMC Danvers. Our team is here to walk you through every feature, answer your questions, and help you find the perfect configuration for your lifestyle or business needs. Get in touch with us today and see why more drivers are making the switch to strength, sophistication, and dependability-on their terms.