2025 GMC Sierra 3500 HD Review
The Sierra 3500 Heavy Duty is a well-built workhorse loaded with premium features and modern tech. At Geoff Penske GMC near Reading, Shillington, and Lancaster, PA, this heavy-duty pickup truck is tailored for buyers who need serious strength without sacrificing comfort. From its robust towing ranks to its upscale cabin and intuitive safety aids, the Sierra 3500 HD is ready for both job site demands and long-haul duties. Keep reading this 2025 Sierra 3500 HD review to explore what makes this truck a standout in its class.
Under the Hood of the Sierra 3500 HD
The Sierra 3500 HD offers two powerful engine choices, both paired with an Allison 10-speed automatic transmission:
- Duramax® 6.6L Turbo-Diesel V8: 470 HP and 975 lb-ft of torque
- 6L Gasoline V8: 401 HP and 464 lb-ft of torque
When properly equipped, it can tow up to 36,000 pounds and handle up to 31,440 pounds in gooseneck or fifth-wheel configurations ? remarkable numbers in the heavy-duty class. Advanced ProGrade™ Trailering Technology includes an in-vehicle app, trailering cameras, and even Adaptive Cruise Control with trailering capability for more confident drives down long roads.
Exterior and Utility
The Sierra 3500 HD’s design is tough and practical. Crew, Double, and Regular Cab configurations come with long or standard beds, plus single or dual-rear wheel setups. The available Six-Function MultiPro™ Tailgate adds flexibility for loading, unloading, and working from the truck bed.
LED projector headlamps and Vibrant new 20″ wheels (on SLE/SLT trims) boost visibility and style. Available trailering mirrors include extendable arms, auxiliary spot lamps, and perimeter lighting—ideal for towing heavy gear.
About the Sierra 3500 HD’s Spacious, Tech-Rich Cabin
Inside, the Sierra 3500 HD balances heavy-duty functionality with driver comfort. Crew Cab models offer generous legroom, and premium front seats can be heated, ventilated, and powered up to 10 ways. Dual-zone automatic climate control enhances cabin comfort. A large 13.4-inch touchscreen anchors the dashboard, while a 12.3″ Driver Information Center delivers personalized driving data, available on SLE and SLT trims. Wireless Apple CarPlay® and Android Auto™ come standard, and select trims offer Google-built infotainment for deeper integration.
Safety and Driver Assistance
Safety systems are a core focus of the Sierra 3500 HD. The Sierra HD Pro Safety suite comes standard, featuring: Forward Collision Alert, Automatic Emergency Braking, IntelliBeam® headlights, Pedestrian Detection, Lane Departure Warning, Blind Zone Steering Assist, Rear Cross Traffic Braking, and a Safety Alert Seat. Up to 14 camera views, including a Transparent Trailer View, help with backing, hitching, and tight maneuvering. These systems give you real-time visibility and proactive safety support during your most challenging tasks.
Is the GMC Sierra 3500 HD a reliable truck?
A: The GMC Sierra 3500 HD is widely considered a reliable heavy-duty truck. In fact, the Sierra HD lineup—which includes both the 2500 and 3500 models—earned the Strategic Vision Total Quality Impact Award in the Heavy Duty Pickup category. This award reflects feedback from real owners and measures emotional satisfaction, indicating that drivers find the Sierra HD to offer excellent long-term value and overall quality.
How much can the Sierra 3500 HD tow?
A: The Sierra 3500 HD can tow up to 36,000 pounds with the Duramax® 6.6L diesel engine, which is engineered for the toughest towing jobs.
What technology aids are available for towing?
A: You get ProGrade™ Trailering Tech, which includes adaptive cruise control with tow mode, Transparent Trailer View, the in-vehicle Trailering App, and up to 14 camera angles for hitching and handling heavy loads.
Find a GMC Sierra 3500 HD
This 2025 GMC Sierra 3500 HD review highlights why this heavy-duty pickup is one of the most capable trucks in its class. Visit Geoff Penske Buick GMC near Reading, Shillington, and Lancaster, Pennsylvania, to experience the Sierra 3500 HD in person and discover how it’s built to elevate your most demanding jobs and everyday drives. Schedule a test drive.